Login Logout buttons on lms website stopped working

Hi. I have an Wordpress LMS website and the login and logout buttons stopped working. The page just hangs with a spinning loader. So something's trying to come up and it was working fine before. I'd like to get the social login on there and working. i can do the keys and all that, just set it all up. For some reason, it's on the admin login and nowhere else. The header is run outside of Elementor, so it's hard to edit and troubleshoot. I don't have time to wait for a fix from the author. But other people were commenting that this was a known issue. I also need the colors changed on that button. Very hard to edit that functionality in the theme. I also have this from my host. i replaced the domain with dots. https://....org/ a GET request is made to url "https://....org/?edumall-ajax=lazy_load_template&_tutor_nonce=ab2c28b508&template=template-parts%2Fpopup%2Fpopup-content-login&_=1678222460093" which returns status "500 Internal Server Error", and the following php error is recorded: ==> /home/.../logs/...[login to view URL] <== [07-Mar-2023 20:56:18 UTC] PHP Fatal error: Uncaught Error: Call to undefined function wc_nocache_headers() in /home/.../public_html/wp-content/themes/edumall/framework/[login to view URL] Stack trace: #0 /home/.../public_html/wp-content/themes/edumall/framework/[login to view URL](84): Edumall_AJAX::send_ajax_headers() #1 /home/.../public_html/wp-includes/[login to view URL](308): Edumall_AJAX::do_ajax('') #2 /home/.../public_html/wp-includes/[login to view URL](332): WP_Hook->apply_filters(NULL, Array) #3 /home/.../public_html/wp-includes/[login to view URL](559): WP_Hook->do_action(Array) #4 /home/.../public_html/wp-includes/[login to view URL](13): do_action('template_redire...') #5 /home/.../public_html/[login to view URL](19): require_once('/home/blackfait...') #6 /home/.../public_html/[login to view URL](3): require('/home/blackfait...') #7 {main} thrown in /home/.../public_html/wp-content/themes/edumall/framework/[login to view URL] on line 60 It appears that line 60 of the php script [login to view URL] is trying to call a function named "wc_nocache_headers", but that function has not yet been defined by that point in the processing. If it is expected for the function to be defined, you may want to check where it is expected to be defined. If it is expected for the function not to be defined, but not expected for this to cause an error, you may want to check what php version this is expected to require in order to work as expected. The site appears to currently be set to php version 8.0: root@host [~/support/1420337]# whmapi1 php_get_vhost_versions | grep -B1 " ....org$" phpversion_source: domain: ....org version: ea-php80 vhost: ....org