...Unfortunately it will take some time to fix...The stack window should show some info, and you can locate your code in there.
It looks like you have fpc packages compiled without debug information. You need to compile packages (fcl-db in this case) with debug information enabled.
No, he doesn't need. (unless he wants to see the line in fcl-db)If there is no debug info in fcl-db, then the debugger is supposed to find the first line that has debug info.In this case his ButtonClick.