Sometimes a WordPress site can show the error message below showing that there is an issue with the application. This can be the result of a faulty update, misconfiguration, etc.
Changing the PHP version can often resolve this issue. You can change that in the Platform:
If that doesn't resolve the issue then check the web server error logs and debugging the WordPress application.
To access the web server error logs follow the guide below:
To debug WordPress follow the guide below: