@leocg It was not but apperently there was a bug in it to where every like 10 minutes it does it I am not sure why, but what I did was clear it out by just uninstalling the whole thing and also putting it into a software I created to get rid of little bugs like that. So it is now fixed. Thanks for replying and trying to help though.
Goto the URL opera://settings/keyboardShortcuts, scroll down to "Show sidebar", hover over it, click "type a shortcut", and hit F4. Then you can use F4 to toggle it.
You don't have to use F4 though. It's just what the old Presto-based Opera Browser suite (Opera 12) used to toggle its sidebar.