You are unable to complete the WordPress Toolkit installation due to a vague error in the user interface.
The installation fails with a vague error when installing WordPress Toolkit through the WHM » Home » Server Configuration » WHM Marketplace. There are no additional details logged in the cPanel error log. The error present is:
Error: There was a problem with the install. Refresh the page and try again.: [object MessageEvent]
Restart the cPanel cpsrvd process.
If this also prevents the installation from completing, please run it manually Wordpress Toolkit Manual Installation. If you continue to face issues with the installation, please open a ticket and provide any output from either the WHM or the command line.