Hi,
Actually, all of this should be managed by the UI system directly. you are using the new UI yes? then you can set in the Canvas Scaler Component ( on the canvas GO) mode to "Scale with screen size" and put the match to 0.5.
this is how I solve screen ratios, and it works very well, play around with this.
else, the ortho size action works, maybe you need to try and download it again from the eco ( you may have had a glitch and the code wasn't downloaded properly).
Bye,
Jean