Your not going to find a download link on GitHub using the link provided. Usually the download link can be found under the release tab, in this case vacant. The launcher automatically updates to the current build, so in this case if your using the developer’s build, the latest version “c1e5fda” is bricked.
I’m having the same issue as you have right now, so I did some digging and came up with the following solution: Download the latest release build here: https://openrct2.org/downloads/releases/latest. This should also resolve the error message from popping up “contains invalid data”.
Hope this helps, otherwise you just need to be patient with the developers, after all that why the developer’s build is updated so much, to test changes, find problems and ultimately fix them before releasing it on the release built.
