Go to https://en.m.wikipedia.org/wiki/Special:Contributions . Observed:
No such page Cannot look at history for a page that doesn't exist. It may have been deleted or you may have followed a bad link.
With a username ( https://en.m.wikipedia.org/wiki/Special:Contributions/Amire80 ) it works as expected.
I'd expect it not to fail completely, but to ask me for a username.
There's also a bit of an RTL angle here, because the same page in the Hebrew Wikipedia shows a translated error message, but without RTL direction set: https://he.m.wikipedia.org/wiki/Special:Contributions (but this might be a separate issue with how error pages work).