Problems with Canvas and ui elements scaling at runtime

Hi,

I'm in a bit of a problem here. I'm Working on a project atm and i found this issue and its really annoying me big time.... Inside the unity Game window everything looks fine untill i check the Aspect Ratios for the Screen resolutions.. Once i look up the 1280x768 resolution, the button elements and text either disapears or gets smashed flat.. And when i build the Project, to test if everything works properly then no matter what resolution i use, then everything overlaps each other.

I've tried: window mode, ALL the resolutions up to 1920x1080 and it still doesnt make any change.... Does anyone have a clue on this issue and maybe be able to help me to fix this issue?

Thank you in advance!