This is critical because I am trying to upload a WebExtension version for a legacy addon before the Tuesday release of Firefox 57.
I’m unable to upload my addon to AMO due to this error:
Error: Icon at “images/48x48.svg” must be square.
The icon in question is indeed square (it is 48x48). I’ll open a ticket in github, but is there any way to get around this problem so I at least get my WebExtension version uploaded. By the way, I have 6 betas of this addon already released, all with this supposedly non-square icon.