XCode - GitHub ´SecureTransport error: I/O error. (-1)´

I'm having an issue when pushing to my GitHub repo (it's an iOS app for iPhone). I haven't had any problem doing this in the last few years. However, without changing anything related to the connection between XCode and GitHub, now I get this error message:

I've checked and all my credentials are up to date, the project is working fine, and I'm able to do commits, but when I do the push. The error appears and no push is done.

Furthermore, I've tried pushing other projects and there is no problem. Also, the push size is not that big.

What should I do to solve this error? I'm using the Source Control functionality of XCode.

When doing the push through command line (terminal), I found out that the error was produced due to a file that had a size of +100MB. I had to remove it and everything went fine.

Remark: That file was a pod library. So, be careful when pushing all your project. At the end, to backup the whole project you just need the podfile, as it is the one you use to install pod libraries.