H2VX

 H2VX  is a service to convert hCard microformats to vCard, and hCalendar microformats to iCalendar.

no tidy
If you see an error like "no tidy :(" then it is likely that the PHP version has been automatically upgraded on the server without re-enabling the php-tidy extension.

The fix is to ping an admin and ask them to check the phprc file on the H2VX server (likely at the path ~/.php/N.M/phprc where N.M is the PHP version like 7.4 or 8.0 ) and see if it has the line: "extension = tidy.so" If not, edit the phprc file and add it. That should fix it.