The plugin itself is very functional and nicely made, but somehow not compatible with the up to date php versions. I’m getting the following error message above my categories:
Warning: A non-numeric value encountered in /data/web/virtuals/153331/virtual/www/domains/homepage/wp-content/plugins/collapsing-categories/collapscatlist.php on line 267
Please fix and update your plugin and I will install it again!
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