Thank you for contacting us and I'd be happy to assist.
Have you checked the server's error log to see if any detailed errors or warnings are recorded? If not, I'll recommend, turning on WordPress debugging and sharing any errors or warnings that you see there.
( ref: https://wordpress.org/support/article/debugging-in-wordpress/ )
In case there are no other errors or warnings, I'll suggest the following steps for further troubleshooting:
1. Please make sure that WordPress, active theme, and plugins are all updated to the latest versions.
2. It would be interesting to test this with all non-Toolset plugins disabled and a default theme like Twenty Twenty-One.
If it's fixed, you can start adding the disabled items, one by one, to narrow down to a possible conflicting one.
3. In case the issue still persists, you can share temporary admin login details, so that I can see how Toolset plugins are set up in the admin area.
Note: Your next reply will be private and making a complete backup copy is recommended before sharing the access details.
