Hello, IRONTHRONED 

Could you, please, describe your situation in details? The exact date when you activated the boost and its name.

Also, please, send us your game ID (Menu ---> About the game) in private messages. 

Waiting for your answer and thank you in advance!

IronThroneD said:

My Inquisitor yielding boost has stopped working.  Also i cant connect to the support

Remember, that boost only applies to the march he's on. Same with hero.

Yes, that is DEEPLY annoying.

Hard to tell, too, as there is no indicator for yield time, until you're actually there. (Plarium, this would be REALLY useful to see. e.g. Will my yield finish before something like Hunting Enemies starts?)

To see, send 3 marches simultaneously or in order 1,000 troops each. Once there, click on tile to see yield duration. With / out Hero, Inquisitor, etc.

You can see this more directly on capacity: Click capture on a tile - as you un/check Hero or Inquisitor, the capacity changes.

[Would be nice if it showed duration in the same area.]

Post again if this wasn't the problem.

You can also tell if this is Inquisitor specific - send 1,000 troops somewhere, as above. Then apply a Boosts / Resource Yielding Speed boost and the duration should drop.