I use PopUps in translatewiki.net. However and because they do not use index.php?... but i.php?... in their diff URLs (e.g. diff link) the script crashes:
Browser Console Log (using PopUps in translatewiki.net)
19:05:16.145 Uncaught TypeError: this.value is null
namespaceId https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:49
isInStrippableNamespace https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:53
getPrintFunction https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:127
html https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:123
navlinkStringToHTML https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:123
popupTopLinks https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:23
popupTopLinks https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:23
fillEmptySpans https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:64
simplePopupContent https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:6
mouseOverWikiLink2 https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:6
mouseOverWikiLink https://en.wikipedia.org/w/load.php?modules=ext.gadget.Navigation_popups:4
load.php:49:946
19:05:16.154 XHRPOSThttps://translatewiki.net/w/webfiles/jserror.php
[HTTP/2 200 OK 69ms]This doesn't happen for page popups as they use the same URL path structure the WMF uses.
I was wondering if the gadget could be modified to add a custom option for this, so we can benefit from PopUps on that wiki that wiki or others whose index.php paths are not the ones we use.
Thank you.