Hello,
When the plugin is deactivated the registration form in the Off-Canvas works fine. Enter info – https://prnt.sc/1uhmrlp , you will be registered and my account page will open as for logined user – https://prnt.sc/1uhmtyx
Note that we do not give a guaranty for full theme compatibility with all existing 3rd party plugins. Sometimes, not always, you need additionally customize the theme or plugin to make them work together. Unfortunately, it’s not possible for the author to make the theme compatible with all the existing plugins and additional customization is outside the scope of our support.
Try to contact the support of the plugin to get assistance.
Regards