Sliding Door - massive problem

Replacing locks from our fixer upper house when always reliable junior and his friends decided to shut the screen door when it wasnt fully completed. Now I cant seem to unlatch it from the wall. Hopefully pictures will give a better understanding. Is there anything to be done or just angle grind it to oblivion?The yellow circled area is why its locked - the rest moves freely

Have you tried putting the handle and spindle back in the hole and turning it?
Or you can put a large flat blade screwdriver in the square hole diagonally and turn it.

Thanks chippy - unfortunately yes have tried that even reconstructed the entire latch within the door in hopes it would click it but nothing seems to budge that one area - its almost locked for eternity lol

And you have tried putting the cylinder back in?
You won't be able to screw the cylinder in while it's on but if you can hold it in place and turn the key it may work

Yes lol tried that too - again seems unrelated to any other part of the mechanism like its its own separate thing - odd as had replaced all the other locks and even this one was installed and working fine just wanted to change out the lock (putting the old lock barrel in to replace the newer one so less keys) buy when the kids closed the door when it was just the internal part it insta-locked in place

May have to ask manufacturers if there is a solution

Thanks for all your help chippy and others looking - managed to solve it by sheer luck and no longer caring if it got destroyed