I'm sure someone will be along and ask you to go to introductions and let us know a bit about you.
In the meantime, welcome to the forum.
A click could mean one or more of many things.
- Screw Broke
- Misalignment popped into place
- Thread stripped
- Friction Release
- Screwdriver shaft rotated
- Scope Tube Collapsed
you get the idea..... hard to say from here.
I would recommend removing the scope, mounts, rings, etc and do a visual inspection on everything. including the tapped holes. Try your screws in the threads.
Then give it a try again.