it looks like steam isn't running or you don't own arma 3 the launcher will still work but you will not be able to download/play with steam mods?????
So my friend is trying to play Arma 3 exile with us but every when he installs the mods and tries to join he gets the error i pasted above. Before this when he would click the download button on a server we were playing on they wouldn't install the right ones and we fixed that by installing them each individually. We have tried everything from the pathway to validating game cache. Some one please help.
I have had the same problem and really would like some help resolving it.