ERA problem in ETO

[gosd]

Hello, I have this problem; afther doing a recovery program and stating at era1 then restarting at every era, everything is fine till I get to era4 then afther start-up I cannot access the missions.The description page is blank!
I checked and all of the missions are in the folder but the game does not read it.And if I restart the game it's stuck on this era4 but with missions of era1.
Can I fix this without doing a reinstall? I tried using the era recovery program twice and still the problem prevails.

[gosd]

I found the problem: a faulty mission in the era4 historical folder.