RESOLVED.
I went to my ‘wp-config.php’ and edited the “define(‘WP_DEBUG’, false);” line to ‘true.’ I then repeated the authentication process, which then revealed this error:
” Fatal error: Uncaught Error: Call to undefined function cmb2_bootstrap() in mydomain/wp-content/plugins/profile-tabs-for-ultimate-member/includes/cmb2/init.php:152 Stack trace: #0 mydomain/wp-includes/class-wp-hook.php(286): CMB2_Bootstrap_221->include_cmb(”) #1 mydomain/wp-includes/class-wp-hook.php(310): WP_Hook->apply_filters(NULL, Array) #2 mydomain/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 mydomain/wp-settings.php(467): do_action(‘init’) #4 mydomain/wp-config.php(95): require_once(‘mydomain…’) #5 mydomain/wp-load.php(37): require_once(‘mydomain…’) #6 mydomain/wp-admin/admin.php(31): require_once(‘mydomain…’) #7 mydomain/wp-admin/options-g in mydomain/wp-content/plugins/profile-tabs-for-ultimate-member/includes/cmb2/init.php on line 152 ”
After deactivating the plugin in the error message, I repeated the authentication and it worked super fine.
I then reactivated the plugin in the error message (cause I need it), and so far so good. Everything is working fine.
If the error message is of any help, please use it to check for conflicts or something..
Thanks.