Hello Michael

Thank you for reaching out to us.

I can't replicate the issue on your website (see attachment). Was the issue resolved?

I see, Michael, thanks for clearing that up.

Can you please deactivate wpDataTables, and then go to ../wp-content/plugins/wpdatatables/ folder, and edit wpdatatables.php file?

In it, go to line 51, and you'll see this:

function wpdatatables_load()
{
    if (is_admin()) {

Enter a new row on line 51 and add this:

ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);

So it looks like this:

function wpdatatables_load()
{
ini_set('display_errors', 1);
ini_set('display_startup_errors', 1);
error_reporting(E_ALL);
    if (is_admin()) {

Save the file, and try to replicate the issue. That should show you an error, indicating why there's a critical error on the page. Once you share that error with me, you can revert the changes made to that file.