When the option "set Carbonite quest log to Alt+L keybind" is enabled, you cannot open the Blizzard (default UI) quest log while in combat.

The problem is within the Carbonite Quest module (as when it's turned off the problem does not persist). Fiddling with options does not fix anything.

Using Alt+L to open the Carbonite Quest log still works however.

Yeah it might not be a good solution for this but ill try to fix it...

Took longer than i expected but i did fixed it ;)

Tested it and it works without any issue. Thanks for the fix!

Should be fixed now.