When i party withj 3 or more people i cant queue a standard deadlock match without getting this error

[Dazuko]

 

[Dazuko]

and when i try to reque this happens

 

[farewell]

rtfm. u should pick 4 heroes in order to queue with 3 ppl party

 

[pikokino]

Had this error yesterday. You have to just fill up your roster a little more, and if in the case it persists like it did for one of my friends, just restart the game and all should be well.