6.2 Compatibility small issues breaks complete site
Extension would work ok on T3 6.2 if all the occurrences of:
Would be just commented out.
A couple of files to patch with this no-brainer, including wt_doorman_pivars_check.php.
As autoloader was introduced in 4.5 or before, the extension would stay compatible with outdated 4.5.
(atm it's stated to work with 4.0 up to 4.7 ...)