Thread:Extension talk:Header Tabs/HeaderTabs + MW 1.19.2 / 2

Hmm ... I just upgraded my wiki to 1.19.2 and realise something strange. When testing HT on scratchy everything works as expected, even if I use. This one is on 1.19.2, too. However, on my wiki I get the following error message when using : "mw.loader::execute> Exception thrown by ext.headertabs: rules[r].selectorText is undefined load.php (line 148)". It works with  though but I would like to avoid having to change this on heaps of pages.