Steps to replicate the issue (include links if applicable):

• Attempt to upload an MP3 file to Commons, using a mobile phone.

What happens?:
An error flag appears but it is not clickable. The error message itself is not readable and all there is is an i with a circle around it.

What should have happened instead?:

The user needs to click "use desktop mode" in their mobile browser in order to see the page as originally intended, because the page has only been tested on desktop.

Other information (browser name/version, screenshots, etc.):

Chrome on Android.