Hello,

First, you should increase the “PHP Max Input Vars” parameter is set to 1000 which is not enough for our Theme Settings. You need to increase it to 2000 or higher in your PHP configuration. Contact your hosting provider for help on this matter.

Second Please deactivate all the 3rd party plugins and activate only theme-required plugins on the site and then check the issue. I am sure your issue will be solved. Then Activate the 3rd party plugins one by one and check which plugin is creating the issue for you.

Otherwise, if the issue still exists then keep the 3rd party plugins deactivated and let me know so I will check it further.

Best Regards.