The app builder plugin required PHP version 7.4 or higher
PHP HTTP AUTHORIZATION HEADER ENABLE
Most of the shared hosting has disabled the HTTP Authorization Header by default. You can check status by flow steps in screenshot below:
If your web server not enable, you can contact your hosting provider and enable it. We not support this issue.
PUT, DELETE Method
In the mobile app and App builder plugin we use some PUT and DELETE method, so if your server not support some features doesn’t work
Example: Edit, Delete a template in App builder plugin