[Forminator Pro] Can't create forms in Forminator Pro

When I try creating a form in Forminator Pro it doesn’t do anything. Also can’t change settings in Forminator Pro.

I have already removed all other plugins to see if it was conflicting with another plugin but still had the same problem. I’ve deleted the folder in the wp-content/plugins/ folder and reinstalled the plugin from the WPMU Plugin Dashboard in WordPress and continue to have the same problem.

I’ve also ensured the Memory Limit is 512M and the max execution time is 300

The website in question is https://ruah.net.au

I need help to resolve this ASAP please. I have installed on many other websites and not had this problem before.