Howdy All,

Have just come across this error on my main site any suggestions or ideas as to what to try - I am up to date, plugins have been checked and up to date, I am only using LocalFiles Editor.

Warning
: usort() expects parameter 2 to be a valid callback, function 'tags_counter_compare' not found or invalid function name in
C:\inetpub\wwwroot\piwigo\include\menubar.inc.php
on line
141

Could it be permissions related, I tend to find on IIS its usually a permissions thing...

....
Piwigo 2.10.2 Check for upgrade
Operating system: WINNT
PHP: 7.2.28 (Show info) [2020-07-08 20:06:07]
MySQL: 5.5.5-10.4.12-MariaDB [2020-07-08 20:06:07]
Graphics Library: ImageMagick 7.0.7-11
Piwigo URL: http://photos.handystuff.info/