Game Save Failed. How to resolve mistake?

[cbuhka]

Internal error: cannot initialize compressor
Portable Apps OTTD Portable.
Disk size 82GiB free

[GGa]

Unfortunately I'm not an expert nor am I able to solve your problem.
I'm just trying because nobody replied...

In one of the pictures it seems that also loading a game failed.
Does it happen only with that single saved game, or with any game?
In the first case, that savegame may be corrupted.
In the secondo case, I would try to 1) make a copy of the .sav files, 2) reinstall the game, and 3) retry loading.
It turns out that the .sav files are compressed with LZMA.
The error message says that there is a trouble with "liblzma" i.e., presumably, the library used to compress and decompress the games.

I just verified that .sav files can be opened and tested with the "7zip" program.
If you have or can install it (it's free, by the way), you could try to open a .sav file and verify it by the command "Test archive" (some other software able to deal with that format may have a similar function, too). This may (or may not?) help to tell if the savegames are corrupt or not.

This will probably not help you so much, I'm sorry.