Answers.Body: <p>It turned out that PHP did not have simplexml_load_file()  installed.  I ran </p>
  
  <p>apt-get install php7.0-simplexml</p>
  
  <p>Restarted apache and hosed the install in /plugins as well as its database, started over and now it has installed.</p>
  
Answers.ContentLicense: CC BY-SA 3.0
Answers.CreationDate: 2017-09-03T23:27:33.843Z
Answers.LastActivityDate: 2017-09-03T23:27:33.843Z
Answers.UserDisplayName: harrumph
Body: <p>WP: 4.8.1
  CIVI: 4.7.23
  PHP 7.0.22ubuntu0.16.04.1
  Ubuntu 16.04.3 LTS</p>
  
  <p>Installation proceeds and then the CiviCrm page 500s.</p>
  
  <pre><code>[Sun Sep 03 17:24:57.841003 2017] [:error] [pid 2943] [client 24.1.98.245:49332] PHP Fatal error:  Uncaught Error: Call to undefined function simplexml_load_file() in /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php:116
  
  Stack trace:
  #0 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php(95): CRM_Core_Menu::read('/var/www/html/w...', Array)
  #1 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php(175): CRM_Core_Menu::xmlItems(true)
  #2 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php(283): CRM_Core_Menu::items(true)
  #3 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(372): CRM_Core_Menu::store()
  #4 /var/www/html/wp-content/plugins/civicrm/civicrm/api/v3/System.php(49): CRM_Core_Invoke::rebuildMenuAndCaches(1, 1)
  #5 /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/API/Provider/MagicFunctionProvider.php(89): civicrm_api3_system_flush(Array)
  #6 /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/API/Kernel.php(169): Civi\\API\\Provider\\MagicFunctionProvider-&gt;invoke(Array)
  #7 /var/www/html/wp-content/plugins/civicrm/civicrm/ in /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php on line 116, referer: http://mackenzie.southsidescout.com/wp-admin/admin.php?page=civicrm-install
  
  
  [Sun Sep 03 17:25:10.472533 2017] [:error] [pid 2944] [client 24.1.98.245:49338] PHP Fatal error:  Uncaught CRM_Core_Exception: [0: Found installation canary. This suggests that something went wrong with tracking installation process. Please post to forum or JIRA.
  
  thrown in /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/Core/InstallationCanary.php on line 53
  
  
  [Sun Sep 03 17:25:21.322206 2017] [:error] [pid 13881] [client 24.1.98.245:49342] PHP Fatal error:  Uncaught CRM_Core_Exception: [0: Found installation canary. This suggests that something went wrong with tracking installation process. Please post to forum or JIRA.
  
  thrown in /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/Core/InstallationCanary.php on line 53, referer: http://mackenzie.southsidescout.com/wp-admin/
  </code></pre>
  
  <p>Any thoughts?  Permissions appear clean</p>
  
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-09-04T16:07:24.277Z
Comments.Text: Thank you for posting this question and the answer! This is a good example of how just participating in Stack Exchange helps the community.  It took me just a few minutes to write a check for the PHP XML module, so less savvy folk than yourself won't have to experience this: [CRM-21142](https://issues.civicrm.org/jira/browse/CRM-21142)
Comments.UserDisplayName: Jon G - Megaphone Tech
Comments.ContentLicense: CC BY-SA 3.0
Comments.CreationDate: 2017-09-05T16:33:17.337Z
Comments.Text: Jon, I'm thrilled to have helped out.  Thanks very much for your work on this amazing software.
Comments.UserDisplayName: harrumph
Tags: <wordpress><install>
Title: Wordpress Civi install keeps puking with "canary" and simplexml_load_file() error
ThreadText: # Wordpress Civi install keeps puking with "canary" and simplexml_load_file() error
  
  (Asked by: username_0 on 2017-09-03)
  
  WP: 4.8.1
  CIVI: 4.7.23
  PHP 7.0.22ubuntu0.16.04.1
  Ubuntu 16.04.3 LTS
  
  Installation proceeds and then the CiviCrm page 500s.
  
  ```
  [Sun Sep 03 17:24:57.841003 2017] [:error] [pid 2943] [client 24.1.98.245:49332] PHP Fatal error:  Uncaught Error: Call to undefined function simplexml_load_file() in /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php:116
  
  Stack trace:
  #0 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php(95): CRM_Core_Menu::read('/var/www/html/w...', Array)
  #1 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php(175): CRM_Core_Menu::xmlItems(true)
  #2 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php(283): CRM_Core_Menu::items(true)
  #3 /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Invoke.php(372): CRM_Core_Menu::store()
  #4 /var/www/html/wp-content/plugins/civicrm/civicrm/api/v3/System.php(49): CRM_Core_Invoke::rebuildMenuAndCaches(1, 1)
  #5 /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/API/Provider/MagicFunctionProvider.php(89): civicrm_api3_system_flush(Array)
  #6 /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/API/Kernel.php(169): Civi\\API\\Provider\\MagicFunctionProvider->invoke(Array)
  #7 /var/www/html/wp-content/plugins/civicrm/civicrm/ in /var/www/html/wp-content/plugins/civicrm/civicrm/CRM/Core/Menu.php on line 116, referer: http://mackenzie.southsidescout.com/wp-admin/admin.php?page=civicrm-install
  
  [Sun Sep 03 17:25:10.472533 2017] [:error] [pid 2944] [client 24.1.98.245:49338] PHP Fatal error:  Uncaught CRM_Core_Exception: [0: Found installation canary. This suggests that something went wrong with tracking installation process. Please post to forum or JIRA.
  
  thrown in /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/Core/InstallationCanary.php on line 53
  
  [Sun Sep 03 17:25:21.322206 2017] [:error] [pid 13881] [client 24.1.98.245:49342] PHP Fatal error:  Uncaught CRM_Core_Exception: [0: Found installation canary. This suggests that something went wrong with tracking installation process. Please post to forum or JIRA.
  
  thrown in /var/www/html/wp-content/plugins/civicrm/civicrm/Civi/Core/InstallationCanary.php on line 53, referer: http://mackenzie.southsidescout.com/wp-admin/
  
  ```
  
  Any thoughts? Permissions appear clean
  
  **Tags:** wordpress, install
  
  > **Comments:**
  > **username_1**: Thank you for posting this question and the answer! This is a good example of how just participating in Stack Exchange helps the community.  It took me just a few minutes to write a check for the PHP XML module, so less savvy folk than yourself won't have to experience this: [CRM-21142](https://issues.civicrm.org/jira/browse/CRM-21142)  
  > **username_0**: Jon, I'm thrilled to have helped out.  Thanks very much for your work on this amazing software.  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_0 on 2017-09-03. Score: 4
  
  It turned out that PHP did not have simplexml\_load\_file() installed. I ran
  
  apt-get install php7.0-simplexml
  
  Restarted apache and hosed the install in /plugins as well as its database, started over and now it has installed.
  
  
  ---
  
  