categrory view / Error since 3.0.18.x

[Tentaurus]

when I update to 3.0.18.1 / 2 / 3 I get an error page when I open a category view page: "Call to a member function displayMediaThumb() on null"
It happens with two different sites.
With 3.0.18 ist works well...

Joomla 3.6.4
PHP 7.0

[jenkinhill]

Are you using a commercial template with old overrides?  Test with Protostar to see if the error goes away.

[Ghost]

Update category template override http://forum.virtuemart.net/index.php?topic=135628.msg474433#msg474433.

[Tentaurus]

ok, thanks for your hint! I will check this with the template devs...