Today I was quietly doing something in roblox studio, I don’t know what I did but when I play it in roblox studio a window called “Call Stack” appears and tells me all the errors in the game, but I want to remove it.
https://gyazo.com/690e4272102e24a1815328acbce9c998
I would appreciate your help sorry for my grammar I use a translator}
The call stack appears every time there is an error in a game of mine
Open the “Breakpoints” window in Studio and check if there is any, that usual appears when there’s a breakpoint.
How many local variables are in your script?
As @DEVLocalPlayer mentioned, it is an breakpoint (click to go to docs);
Breakpoints are checkpoints that pause or “break” the execution of your scripts at specific lines. You can use the pauses to inspect and debug your experience, watch variables, and inspect the call stack.
You can see where it is in the Script Editor (video you showed). Click on the red dot next to the line (7 in this case) and the breakpoint should dissapear.

I already checked but I can’t find anything
Check line 7 of script MatchHandler
It’s not really just a script, every time there is an error in any game that encounters an error the call stack will direct me to it. sorry I use translator
Change Debug Errors in the Script tab to Never