Hello,
1) Some limits are still reached because we get 500 error for the ajax https://prnt.sc/20o364p
Please, contact your hosting provider and ask to look at the server error logs. What errors do you have there?
2) Once we activate WooCommerce it causes fatal error. Follow this guide and try to solve this https://stackoverflow.com/questions/63576290/how-to-solve-duplicate-entry-0-for-key-primary-in-wordpress
Because that error is not related to theme but to WooCommerce and DB.
Regards