Sorry to hear that you have faced an issue on your end.
It seems like there must be some theme/plugin conflict on your end. Just to be sure deactivate all plugins except Woocommerce,MultiVendorX, MultiVendorX Pro on your end and also switch to some default theme such as twenty twenty four or storefront and check again.
If still the issue persists please create a staging site that should be an exact replica of your live site and share the staging site URL, temporary admin and FTP access with us.
While sharing the access don’t forget to mark your reply as private.