sensorsdb is missing!

I know it has been written a lot about this topic but non of it is helpful with my problem. 

I have the “Yellow Triage” and I have tried to locate sensorsdb file but for some reason is missing!

I have the most recent version of Reality Capture, can someone help me locate this file and add my camera?

For some reason the software thinks I have used 77mm lens, when I used 50mm. 

Thank you in advance. 

Perhaps there is an error in the sensor size for your camera.