Add proper error message in case re146.dev is down.

[vaibhavvikas]

Hello, the other day (again) https://re146.dev/factorio/mods/en stopped working and now I found software that could help me, but here's the problem, when I try to download it gives an error - 'NoneType' object has no attribute 'get text'

Perhaps the problem is that I'm from Russia and our beloved Roskomnadzor blocked something again (Accidentally or on purpose, it doesn't matter)

Originally posted by @Artikal-afk in #2 (comment)