I had uploaded maps before without any problem. Since today it does not work and I get that error from the server:
Having the exact same issue. Anyone know how to fix this?
I think some Server Admin has to look into this.
@Sheikah and I investigated this. The last client release contained a newer library which caused this issue. Updating our dependencies will fix this.
We'll probably release an intermediate release candidate that you can use. Since only map upload is broken, we're not going to do a full release at this causes thousands of players to download the whole 130mb installer.
Thank you very much for the fix and invested time.
You can install this version of the client and it should work https://github.com/FAForever/downlords-faf-client/releases/tag/v1.2.4-RC1
Can confirm - release 1.2.4 fixed it.