Hello, I don’t know where this error is coming from. The users who experimented it said it went away after a retry.
I see you selected the Chinese autotranslation. Are you in China’s mainland? Are you able to open this website https://github.com/ ? If not, you will probably have to wait until the 1.5.1 to fix the downloads from China (the 1.5.1 should come out this week end).
Also, can you do a test without the automatic translation activated? Does it work in English?