Thanks for posting the links. I can (and could) access both, so I have not seen the problem you do.
I think both links contain updated scripts, but I used the one in the instructions. If I am not mistaken the second one that points to ‘youness.alaoui’ in the forum thread about coreboot is where it was originally when @kakaroto released it. I have not compared them, but I think they are the same. (Others are welcome to correct me.) They may even be linked “under the covers.”
Unfortunately, the date and version information of the script is not in the actual file. I looked for my Librem model and firmware version, currently 4.8.1-Purism-3, in both before I ran it.