WP Security Scan – Changed Table Prefixes – Site Down!! HELP!!!

I just installed the WP Security Scan plugin, and had it change my table prefixes.

After I did this, I can no longer access wordpress (so I can’t correct my problem where it was caused) or my website!!

I get the following message when I visit my website URL, and when I visit the WP login:

ERROR: $table_prefix in wp-config.php can only contain numbers, letters, and underscores.

!!!!HELP!!!!!!!!