The error message "Unable to connect to Web Presence Builder server. Please contact the server administrator" in Plesk Obsidian can be caused by various issues related to the configuration or operation of the Web Presence Builder. Here are steps to troubleshoot and potentially resolve the issue:

1. Check Web Presence Builder Service:

   • Ensure that the Web Presence Builder service is running on your Plesk server. You can check this in the Plesk panel under "Tools & Settings" > "Web Presence Builder."

2. Review Hosting Settings:

   • If you're trying to access Web Presence Builder for a specific website, make sure that the hosting settings for that website are correctly configured. Ensure that Web Presence Builder is enabled for the website.

3. Verify Permissions:

   • Check the permissions for the Web Presence Builder directories and files on your server. They should be owned by the correct user and have appropriate permissions.

4. Check PHP Version and Configuration:

   • Ensure that the PHP version and configuration used by Web Presence Builder are compatible with the application. Web Presence Builder often requires specific PHP settings.

5. Review System Logs:

   • Check the server logs, including error logs, for any messages related to Web Presence Builder. These logs might provide more specific information about the issue.

6. Check for Server Resource Issues:

   • Insufficient server resources, such as low memory or high CPU usage, can sometimes prevent Web Presence Builder from working correctly. Monitor server resource usage and consider upgrading if necessary.

7. Firewall and Security Settings:

   • Review your server's firewall settings to ensure that they are not blocking Web Presence Builder's communication. Additionally, check for any security modules or settings that might interfere with the operation of the application.

8. Check Domain Resolution:

   • Ensure that the domain you're trying to access Web Presence Builder resolves to the correct IP address. DNS issues can sometimes cause connectivity problems.

9. Web Presence Builder Version:

   • Confirm that you're using a compatible version of Web Presence Builder with your Plesk Obsidian installation. Incompatibility between versions can lead to issues.

10. Restart Services:

    • Try restarting the web server (e.g., Apache or Nginx) and the Plesk service to see if that resolves the issue.

11. Update or Reinstall Web Presence Builder:

    • If you suspect that the Web Presence Builder installation might be corrupted, consider updating or reinstalling it through the Plesk interface.

12. Contact Plesk Support:

    • If none of the above steps resolves the issue, it may be necessary to contact Plesk support for further assistance. They can provide specific guidance and investigate the problem further.

Always back up any critical data or configurations before making changes to your server or its settings, and proceed with caution when troubleshooting server-related issues.

The error message "Unable to connect to Web Presence Builder server" in Plesk Obsidian 18.0.50 indicates an issue with the connection between the Plesk control panel and the Web Presence Builder server. Here are steps to troubleshoot and potentially resolve the issue:

1. Check Web Presence Builder Status:

   • Verify that the Web Presence Builder component is installed and active in Plesk. Go to "Tools & Settings" > "Updates and Upgrades" > "Add/Remove Components" and ensure that "Web Presence Builder" is selected.

2. Verify Web Presence Builder Service:

   • Ensure that the Web Presence Builder service is running. You can check the status of the service using the command:

     lua

     service psa-wpbuilder status

   • If it's not running, start it with:

     SQL

     service psa-wpbuilder start

3. Check Firewall and Ports:

   • Make sure that any firewalls or security measures on your server are not blocking the necessary ports for Web Presence Builder to communicate.

   • Web Presence Builder typically uses port 8880, so ensure that this port is open.

4. Check Web Presence Builder Configuration:

   • Go to "Tools & Settings" > "Web Presence Builder" and verify that the settings are correctly configured, including the URL for Web Presence Builder.

5. Check for Updates:

   • Ensure that both Plesk and Web Presence Builder are up to date. Outdated software can sometimes lead to compatibility issues.

6. Clear Browser Cache:

   • Sometimes, cached data in your browser can cause issues. Clear your browser cache and try again.

7. Check DNS Resolution:

   • Ensure that the DNS settings on your server are correctly configured so that it can resolve the domain associated with Web Presence Builder.

8. Check for Error Logs:

   • Review the logs on your server for any error messages related to Web Presence Builder or the connection issue. This might provide more specific information about the problem.

9. Contact Plesk Support:

   • If the issue persists, consider reaching out to Plesk support for further assistance. They may have encountered similar issues and can provide specific guidance.

Remember to backup any critical data or configurations before making significant changes to your server or its settings.