Answers.Body: <p>You have custom plugin or extension that is interacting with Activity type which expects custom fields in the system and is either disabled or deleted. </p>
  
  <p>Solution:
  1. Turn off the extension if the system no longer needs it.
  2. Enable/Add the custom field or custom group back into the system</p>
  
  <p>Cheers</p>
  
  <p>Pradeep</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-09T13:58:52.417Z
Answers.Text: We tried to disable all the pluging one by one and in logical group with no changes. Is there a way to find the custom field/group name?
Answers.UserDisplayName: Francesco Garganese
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-09T14:25:10.340Z
Answers.Text: Enable backtrace by navigating to Administer >> System Settings >> Debugging and Error Handling. And then reload the error page
Answers.UserDisplayName: Pradeep Nayak
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2020-09-21T10:25:34.200Z
Answers.Text: Sorry for the huge delay. Doing what you told me appears: CiviCRM_API3_Exception: "Expected one CustomGroup but found 0" with many more rows reporting about form contruction.
Answers.UserDisplayName: Francesco Garganese
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2019-07-07T18:39:23.773Z
Answers.LastActivityDate: 2019-07-07T18:39:23.773Z
Answers.UserDisplayName: Pradeep Nayak
Body: <p>We have a CiviCRM 5.15.0 installation under WordPress 4.9.10 and 2 MySQL db: one for Wordpress data and one for CiviCRM data.   We manage more than 6500 contacts.</p>
  
  <p>Going inside a contact we have this error message with a blank popup adding a meeting or phone call in the contact summary:</p>
  
  <blockquote>
    <p><strong>Network Error</strong>
    Unable to reach the server. Please refresh this page in your browser and try again.</p>
  </blockquote>
  
  <p>There are <strong>NO ERRORS</strong> adding contributions, registering for events, adding pledges, sending emails.</p>
  
  <p>Analyzing logs we have no errors on Apache, but we found a</p>
  
  <pre><code>CRM_Core_Error::backtrace("backTrace", TRUE)
  </code></pre>
  
  <p>on</p>
  
  <pre><code>wp-content/uploads/civicrm/ConfigAndLog/
  </code></pre>
  
  <p>last file</p>
  
  <p>You can see how the errors come out on this video <a href="https://youtu.be/lrMq6A2t9Uk" rel="nofollow noreferrer">https://youtu.be/lrMq6A2t9Uk</a></p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-07-06T22:19:33.910Z
Comments.Text: If you haven't already, try admin - system settings - cleanup caches. If that doesn't help then open the browser developer tools and on the network tab or console tab try to see where it is failing when you create the meeting.
Comments.UserDisplayName: Demerit
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-07-07T09:55:25.860Z
Comments.Text: I did cleanup without changes. Here is the screenshot opening the browser developer tools and looking at the network tab [picture](https://www.satvolo.org/_zdata/190707_CiviCRM_contactbug01.jpg)
Comments.UserDisplayName: Francesco Garganese
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-07-07T10:18:10.007Z
Comments.Text: Try opening the form in a new tab. Right click on the link and open in a new tab. Check CiviCRM Config Log to find more details of the error.
Comments.UserDisplayName: Pradeep Nayak
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2019-07-07T14:59:02.607Z
Comments.Text: I did it.  here is the [screenshot](https://www.satvolo.org/_zdata/190707_CiviCRM_contactbug02.jpg) and here is the [config-log](https://www.satvolo.org/_zdata/190707_CiviCRM_contactbug_log01.txt) last entry
Comments.UserDisplayName: Francesco Garganese
Tags: <wordpress><contacts><activities>
Title: “Network Error Unable to reach the server” recording Contact activities
ThreadText: # “Network Error Unable to reach the server” recording Contact activities
  
  (Asked by: username_0 on 2019-07-06)
  
  We have a CiviCRM 5.15.0 installation under WordPress 4.9.10 and 2 MySQL db: one for Wordpress data and one for CiviCRM data. We manage more than 6500 contacts.
  
  Going inside a contact we have this error message with a blank popup adding a meeting or phone call in the contact summary:
  
  > **Network Error**
  > Unable to reach the server. Please refresh this page in your browser and try again.
  
  There are **NO ERRORS** adding contributions, registering for events, adding pledges, sending emails.
  
  Analyzing logs we have no errors on Apache, but we found a
  
  ```
  CRM_Core_Error::backtrace("backTrace", TRUE)
  
  ```
  
  on
  
  ```
  wp-content/uploads/civicrm/ConfigAndLog/
  
  ```
  
  last file
  
  You can see how the errors come out on this video <https://youtu.be/lrMq6A2t9Uk>
  
  **Tags:** wordpress, contacts, activities
  
  > **Comments:**
  > **username_1**: If you haven't already, try admin - system settings - cleanup caches. If that doesn't help then open the browser developer tools and on the network tab or console tab try to see where it is failing when you create the meeting.  
  > **username_0**: I did cleanup without changes. Here is the screenshot opening the browser developer tools and looking at the network tab [picture](https://www.satvolo.org/_zdata/190707_CiviCRM_contactbug01.jpg)  
  > **username_2**: Try opening the form in a new tab. Right click on the link and open in a new tab. Check CiviCRM Config Log to find more details of the error.  
  > **username_0**: I did it.  here is the [screenshot](https://www.satvolo.org/_zdata/190707_CiviCRM_contactbug02.jpg) and here is the [config-log](https://www.satvolo.org/_zdata/190707_CiviCRM_contactbug_log01.txt) last entry  
  
  ---
  
  ## 1 answers
  
  ### Answer by username_2 on 2019-07-07. Score: 1
  
  You have custom plugin or extension that is interacting with Activity type which expects custom fields in the system and is either disabled or deleted.
  
  Solution:
  1. Turn off the extension if the system no longer needs it.
  2. Enable/Add the custom field or custom group back into the system
  
  Cheers
  
  username_2
  
  > **Comments:**
  > **username_0**: We tried to disable all the pluging one by one and in logical group with no changes. Is there a way to find the custom field/group name?  
  > **username_2**: Enable backtrace by navigating to Administer >> System Settings >> Debugging and Error Handling. And then reload the error page  
  > **username_0**: Sorry for the huge delay. Doing what you told me appears: CiviCRM_API3_Exception: "Expected one CustomGroup but found 0" with many more rows reporting about form contruction.  
  
  ---
  
  