Responsive menu issue

Please try installing https://www.ads-software.com/plugins/enable-jquery-migrate-helper/ to see if that fixes the issue.

For more information on what this is all about, see https://wptavern.com/major-jquery-changes-on-the-way-for-wordpress-5-5-and-beyond

If the plugin helps, please contact the developers of the plugins or themes noted in its admin messages.

Hello,

I see jQuery errors on your site. Kindly read the issue addressed by this plugin, and install it to see if it fixes your problem:

https://www.ads-software.com/plugins/enable-jquery-migrate-helper/

If it does fix your problem, consider this a TEMPORARY solution — just to buy you time to migrate to a new theme, as your theme is at a dead end now and will never be updated to address the underlying issue.

Good luck!

Thanks to you both yes indeed- that fixed it.