Hello,
Sorry for the trouble,
Can you try to authenticate using a private window (incognito mode)
to avoid cache issues, if have any.
Are you using any other addons of WPForms?
Can you enable debug mode from wp-config.php while adding
// Enable WP_DEBUG mode
define( 'WP_DEBUG', true );
// Enable Debug logging to the /wp-content/debug.log file
define( 'WP_DEBUG_LOG', true );
// Disable display of errors and warnings
define( 'WP_DEBUG_DISPLAY', false );
@ini_set( 'display_errors', 0 );
// Use dev versions of core JS and CSS files (only needed if you are modifying these core files)
define( 'SCRIPT_DEBUG', true );
Once added above, authenticate again,
and check wp-content folder, automatically debug.log will generate errors.
Let me know with the errors to help you out further.
Thanks
Abdullah