Answers.Body: <p>By testing on the wpmaster.demo.civicrm.org site and going to what i take it is the public version of the contribution page at eg</p>
  
  <blockquote>
    <p><a href="http://wpmaster.demo.civicrm.org/civicrm/?page=CiviCRM&amp;q=civicrm/contribute/transact&amp;reset=1&amp;id=4" rel="nofollow noreferrer">http://wpmaster.demo.civicrm.org/civicrm/?page=CiviCRM&amp;q=civicrm/contribute/transact&amp;reset=1&amp;id=4</a></p>
  </blockquote>
  
  <p>I do not get a blank page which suggests several things including that it isn't broken on dmaster. </p>
  
  <p>Some possible things to try</p>
  
  <ul>
  <li>switching WP themes</li>
  <li>using Inspect to compare output on demo v your site</li>
  </ul>
  
  <p>Not sure how much either will help as not a WP specialist</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-05T20:40:31.643Z
Answers.Text: also if this answers your question then pls Accept it so that it is closed off
Answers.UserDisplayName: petednz - fuzion
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-07T20:50:25.540Z
Answers.Text: yurg - poke - it really helps SE (and your reputation) if you help get answers 'accepted'
Answers.UserDisplayName: petednz - fuzion
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-24T09:55:58.947Z
Answers.Text: Thank you for pointing to "wpmaster" demo instance, seems my issue is local, something hosting or WP config related; I'm not a WP guru either, wish it was Drupal, where I know how to debug, at least. This silent white page just drives me crazy, there have to be traces!
Answers.UserDisplayName: yurg
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-31T12:24:42.340Z
Answers.Text: In the past, I've had similar things happening to Contribution pages.  I found that occasionally, there were conflicts with CiviCRM and other Wordpress plug-ins.  It might be worth you deactivating any other plug-ins that you have, one by one, to see if the problem goes away.  One plug-in that conflicted for me a couple of years ago was Jetpack
Answers.UserDisplayName: peterb
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-31T15:01:14.800Z
Answers.Text: @peterb This is exactly what has happened: still not sure which WP plugin caused the issue, yet disabling a bunch of them makes problem gone. Perhaps, it was one of "security/firewall" WP extensions installed.
Answers.UserDisplayName: yurg
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-01T02:26:51.877Z
Answers.Text: yurg maybe worth systematically switching each off/on to identify exact one
Answers.UserDisplayName: petednz - fuzion
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-05-23T23:56:46.620Z
Answers.LastActivityDate: 2018-05-23T23:56:46.620Z
Answers.UserDisplayName: petednz - fuzion
Body: <p>Wordpress  4.9.6, CiviCRM 5.1.2. Logged in as Administrator, all works fine (Events links, TEST Contribution page) but <strong>LIVE Contribution pages</strong>: gives  just blank page. <strong>Nothing</strong> in  php.error.log, Apache error_log. 
  ConfigAndLog/*  repeatedly says something about "access to page" which, perhaps, is not relevant for WP "super-user". </p>
  
  <p>Deep googling has brought  a few of same cases, each of them has own cause, so there is no pattern.  Any chance this is a well-known issue in the latest versions of CiviCRM / WordPress? Thanks!</p>
  
  <pre><code>#0 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Error.php(381): 
  CRM_Core_Error::backtrace("backTrace", TRUE)
  #1 /public_html/wp- 
  content/plugins/civicrm/civicrm/CRM/Utils/System/WordPress.php(350): 
  CRM_Core_Error::fatal("You do not have permission to access this page.")
  #2 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Utils/System.php(74): 
  CRM_Utils_System_WordPress-&gt;permissionDenied()
  #3 /public_html/wp- 
  content/plugins/civicrm/civicrm/CRM/Event/Page/EventInfo.php(58): 
  CRM_Utils_System::__callStatic("permissionDenied", (Array:0))
  #4 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(309): 
  CRM_Event_Page_EventInfo-&gt;run((Array:3), NULL)
  #5 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(84): 
  CRM_Core_Invoke::runItem((Array:15))
  #6 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(52): 
  CRM_Core_Invoke::_invoke((Array:3))
  #7 /public_html/wp-content/plugins/civicrm/civicrm.php(1246): 
  CRM_Core_Invoke::invoke((Array:3))
  #8 /public_html/wp- 
  content/plugins/civicrm/includes/civicrm.basepage.php(141): 
  CiviCRM_For_WordPress-&gt;invoke()
  #9 /public_html/wp-includes/class-wp-hook.php(286): 
  CiviCRM_For_WordPress_Basepage-&gt;basepage_handler(Object(WP))
  #10 /public_html/wp-includes/class-wp-hook.php(310): WP_Hook-&gt; apply_filters(NULL, (Array:1))   
  #11 /public_html/wp-includes/plugin.php(515): WP_Hook-&gt;do_action((Array:1))
  #12 /public_html/wp-includes/class-wp.php(726): do_action_ref_array("wp", 
  (Array:1))
  #13 /public_html/wp-includes/functions.php(960): WP-&gt;main("")
  #14 /public_html/wp-blog-header.php(16): wp()
  #15 /public_html/index.php(17): require("/public_html/wp-blog-header.php")
  #16 {main}
  </code></pre>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-05-24T07:50:23.600Z
Comments.Text: I see in the log something about permission denied. And I see you are trying to signup for an event. Is that correct? If so is the event public?
Comments.UserDisplayName: Jaap Jansma - CiviCooP
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-05-24T09:52:06.727Z
Comments.Text: @JaapJansma Thank you for note: perhaps these lines aren't even relevant, because it is a Contribution page/form which doesn't work. What puzzles me the most is, there is absolutely no traces in whatever logs I've tried to check (which may mean I haven't found the right log amongst php_error, apache_error, civicrm_log: just running out of ideas where else to look).
Comments.UserDisplayName: yurg
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-05-24T10:15:01.850Z
Comments.Text: @JaapJansma Found this: Events overview page doesn't work either (civicrm/?page=CiviCRM&q=civicrm/event/ical&reset=1&list=1&html=1), yet it leaves   at least traces in log, while this Contributions mystery is totally silent.
Comments.UserDisplayName: yurg
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-05-24T11:29:14.427Z
Comments.Text: Maybe it is a good idea to start with the events overview page and find out if you could trace it back to something which makes sense. Did you try to clear the civicrm caches and templates_c dircetories?
Comments.UserDisplayName: Jaap Jansma - CiviCooP
Tags: <wordpress><civicontribute><contributions><contribution-page>
Title: Blank civicrm?page=CiviCRM&q=civicrm/contribute/transact&reset=1 live contribution page wordpress
ThreadText: # Blank civicrm?page=CiviCRM&q=civicrm/contribute/transact&reset=1 live contribution page wordpress
  
  (Asked by: username_0 on 2018-05-23)
  
  Wordpress 4.9.6, CiviCRM 5.1.2. Logged in as Administrator, all works fine (Events links, TEST Contribution page) but **LIVE Contribution pages**: gives just blank page. **Nothing** in php.error.log, Apache error\_log.
  ConfigAndLog/\* repeatedly says something about "access to page" which, perhaps, is not relevant for WP "super-user".
  
  Deep googling has brought a few of same cases, each of them has own cause, so there is no pattern. Any chance this is a well-known issue in the latest versions of CiviCRM / WordPress? Thanks!
  
  ```
  #0 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Error.php(381): 
  CRM_Core_Error::backtrace("backTrace", TRUE)
  #1 /public_html/wp- 
  content/plugins/civicrm/civicrm/CRM/Utils/System/WordPress.php(350): 
  CRM_Core_Error::fatal("You do not have permission to access this page.")
  #2 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Utils/System.php(74): 
  CRM_Utils_System_WordPress->permissionDenied()
  #3 /public_html/wp- 
  content/plugins/civicrm/civicrm/CRM/Event/Page/EventInfo.php(58): 
  CRM_Utils_System::__callStatic("permissionDenied", (Array:0))
  #4 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(309): 
  CRM_Event_Page_EventInfo->run((Array:3), NULL)
  #5 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(84): 
  CRM_Core_Invoke::runItem((Array:15))
  #6 /public_html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(52): 
  CRM_Core_Invoke::_invoke((Array:3))
  #7 /public_html/wp-content/plugins/civicrm/civicrm.php(1246): 
  CRM_Core_Invoke::invoke((Array:3))
  #8 /public_html/wp- 
  content/plugins/civicrm/includes/civicrm.basepage.php(141): 
  CiviCRM_For_WordPress->invoke()
  #9 /public_html/wp-includes/class-wp-hook.php(286): 
  CiviCRM_For_WordPress_Basepage->basepage_handler(Object(WP))
  #10 /public_html/wp-includes/class-wp-hook.php(310): WP_Hook-> apply_filters(NULL, (Array:1))   
  #11 /public_html/wp-includes/plugin.php(515): WP_Hook->do_action((Array:1))
  #12 /public_html/wp-includes/class-wp.php(726): do_action_ref_array("wp", 
  (Array:1))
  #13 /public_html/wp-includes/functions.php(960): WP->main("")
  #14 /public_html/wp-blog-header.php(16): wp()
  #15 /public_html/index.php(17): require("/public_html/wp-blog-header.php")
  #16 {main}
  
  ```
  
  **Tags:** wordpress, civicontribute, contributions, contribution-page
  
  > **Comments:**
  > **username_1**: I see in the log something about permission denied. And I see you are trying to signup for an event. Is that correct? If so is the event public?  
  > **username_0**: @JaapJansma Thank you for note: perhaps these lines aren't even relevant, because it is a Contribution page/form which doesn't work. What puzzles me the most is, there is absolutely no traces in whatever logs I've tried to check (which may mean I haven't found the right log amongst php_error, apache_error, civicrm_log: just running out of ideas where else to look).  
  > **username_0**: @JaapJansma Found this: Events overview page doesn't work either (civicrm/?page=CiviCRM&q=civicrm/event/ical&reset=1&list=1&html=1), yet it leaves   at least traces in log, while this Contributions mystery is totally silent.  
  > **username_1**: Maybe it is a good idea to start with the events overview page and find out if you could trace it back to something which makes sense. Did you try to clear the civicrm caches and templates_c dircetories?  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2018-05-23. Score: 1
  
  By testing on the wpmaster.demo.civicrm.org site and going to what i take it is the public version of the contribution page at eg
  
  > <http://wpmaster.demo.civicrm.org/civicrm/?page=CiviCRM&q=civicrm/contribute/transact&reset=1&id=4>
  
  I do not get a blank page which suggests several things including that it isn't broken on dmaster.
  
  Some possible things to try
  
  * switching WP themes
  * using Inspect to compare output on demo v your site
  
  Not sure how much either will help as not a WP specialist
  
  > **Comments:**
  > **username_0**: Thank you for pointing to "wpmaster" demo instance, seems my issue is local, something hosting or WP config related; I'm not a WP guru either, wish it was Drupal, where I know how to debug, at least. This silent white page just drives me crazy, there have to be traces!  
  > **username_3**: In the past, I've had similar things happening to Contribution pages.  I found that occasionally, there were conflicts with CiviCRM and other Wordpress plug-ins.  It might be worth you deactivating any other plug-ins that you have, one by one, to see if the problem goes away.  One plug-in that conflicted for me a couple of years ago was Jetpack  
  > **username_0**: @username_3 This is exactly what has happened: still not sure which WP plugin caused the issue, yet disabling a bunch of them makes problem gone. Perhaps, it was one of "security/firewall" WP extensions installed.  
  > **username_2**: username_0 maybe worth systematically switching each off/on to identify exact one  
  > **username_2**: also if this answers your question then pls Accept it so that it is closed off  
  > **username_2**: username_0 - poke - it really helps SE (and your reputation) if you help get answers 'accepted'  
  
  ---
  
  