Using the mixin release v1.10.1 found here the game will crash with:
Caused by: java.util.zip.ZipException: invalid LOC header (bad signature)
fml-client-latest.txt

However, the version published on CF (found here) works fine.

These seem to be 2 unique files, looking at their respective SHA-256:

CF Hash:
1f004032b65e551afc8e1dec6cfdc2c55eded4b2c6964fc241017ca26802b760
Github Hash:
7a8c3bd0679a94ba39bbaae6956444618fccd72d85725aa5c02c466959cc55e0

Please consider replacing the latest Github release with the CF file

Thank you for letting me know! It's fixed now. I don't know how it happened.