**Steps to replicate the issue** (include links if applicable):
I noticed this on https://commons.m.wikimedia.beta.wmflabs.org/wiki/Collapsible_template_test?withgadget=ColMask&uselang=es but not sure what factors are causing this.
**What happens?**:
```
Source map error: Error: request failed with status 404
Resource URL: https://commons.m.wikimedia.beta.wmflabs.org/w/load.php?lang=es&modules=startup&only=scripts&raw=1&skin=minerva&target=mobile
Source Map URL: /w/load.php?lang=es&modules=startup&only=scripts&skin=minerva&sourcemap=1&version=xhk73
```
https://commons.m.wikimedia.beta.wmflabs.org/w/load.php?lang=es&modules=startup&only=scripts&skin=minerva&sourcemap=1&version=xhk73 is a 404 saying `Can't deliver a source map for the requested version since the version is now 'i1rm6'`
**What should have happened instead?**:
200