Theme Panel stuck loading when saving Settings

Hello,

We are not able to do any changes because when we click on Save Settings on the Theme Panel the spinning icon doesnt stop and the panel gets stuck loading. All settings are OK in the system status as per the guide in the Documentation, and disabling all plugins doesnt change it. How can we fix this?

Thank you for your time

Hello,

we have tried everything suggested in those posts and it is still not working. We are getting however these errors repeated constantly in the error log:

/var/www/vhosts/movilidadelectrica.com/httpdocs/wp-content/plugins/td-composer/legacy/common/wp_booster/td_options.php on line 48

/var/www/vhosts/movilidadelectrica.com/httpdocs/wp-content/plugins/td-composer/legacy/common/wp_booster/td_options.php on line 97

Hello,

we havent made any changes to the files.

The theme version is 11.4.2, this problem happened suddently in an older version (in fact all panel options reverted to default) and we thought it might get fixed if we updated it, but the problem still persists with the last version.
The errors only disapear when deactivating the TagDiv Composer (wich we do not use, as we use the WP Bakery Page Builder) but it is mandatory to have it active.

I do not know however if the error are causing the Save Settings problem or if they are different problems.

The website is https://movilidadelectrica.com but note that it is under maintenance right now as the design is completely wrong (because panel options reverted to default).