Slitherine

hi,

i purchase the DLC and then i was unable to play the game anymore…..

code error 51 appear and that's it !

need help please !

That's a Steam error.

Steam Error code 51 usually is caused by the interference of an Internet security program.

I suggest you to check your Internet security programs and create an exclusion scan area for the game's installation folder and for the game main file exes.

If this fails, please also try the other suggestions offered in the link below:
https://appuals.com/fix-error-code-51-g ... -on-steam/

Thanks, i'm not English and not informatician so i try solution in your link and it still doesn't work, maybe i do it wrong… i shouldn't have to pass hours to try to play with a game i purchase and create a problem ( this is the first time it happened on steam ) so i'm sad but i will ask for a refund...

DLC suppressed and now i can't play original game !!! great job !

Like I've said that's a Steam error with the game and usually it's caused by the interference of an anti-virus or a firewall....

Check this thread for example:
https://www.matrixgames.com/forum/viewt ... 88&t=92503

why it work before and not anymore since i purchase the DLC ?

There's no straight answer to that, besides that some anti-virus have a very aggressive behavior when there are changes.

Please notice, that nobody else reported the issue. So the issue is related to your local system, most probably, again, the anti-virus.