Yes, see the message before, basically the error is the last line of the first block:
Comment for (public) key '' does not match GitHub URL pattern. Not treating it as a GitHub deploy key.
It seems like the keys are not recognized somehow, though it seems to me that they should be fine.
This error suggests that the SSH is not successful and as a consequence, the error I was experiencing during the building of the environment is not solved.
The subsequent error is as follows:
ERROR: failed to clone from https://github.com/davide-f/<repo>.jl, error: GitError(Code:ERROR, Class:Net, failed to resolve address for key-cd9edd77eda3f8efb9b9586183a4d3d26afe042eb1e7e8b23e8b41238d3ef161.github.com: Name or service not known)