**List of steps to reproduce**:
* go to any wiki such as https://en.wikipedia.org/wiki/Owo_church_attack
* Under languages click the "**languages symbol and more**"
* Click the missing in XXX, YYY, and more
* Then click the Ellipsis (3 dot) button. Observe that nothing happens.
**What happens?**:
Nothing happens and in the backend displays the error below
```
TypeError: Cannot read properties of null (reading 'replace')
at mw.cx.SiteMapper.getPageUrl (<anonymous>:24:746)
at mw.cx.SiteMapper.getCXUrl (<anonymous>:26:902)
at Proxy.redirectToCX (<anonymous>:20:880)
at onClick (eval at Mp (load.php?lang=en&modules=jquery%2Cvue%7Cjquery.ui&skin=vector-2022&version=1ay06:292:584), <anonymous>:79:27)
at Ft (load.php?lang=en&modules=jquery%2Cvue%7Cjquery.ui&skin=vector-2022&version=1ay06:160:584)
at Vt (load.php?lang=en&modules=jquery%2Cvue%7Cjquery.ui&skin=vector-2022&version=1ay06:160:662)
at HTMLButtonElement.n (load.php?lang=en&modules=jquery%2Cvue%7Cjquery.ui&skin=vector-2022&version=1ay06:226:971)
```
**What should have happened instead?**:
Clicking the ellipsis button should have opened up the CX tool
**Software version (if not a Wikimedia wiki), browser information, screenshots, other information, etc.**:
Chrome browser was used for this.
{F35264193}