when i try to browse cards in my deck, the left window just does not show up. I mean the window that displays the card that you are looking at and I can also not close the browse window or anki itself, I have to force close it with the task maanager, can someone tell me what I should do, thanks in advance.
1 & 2. That’s pretty important information! What about when you disable all of your other add-ons except for that IO add-on? If you get stuck in the same place, that’s a good sign it’s the IO add-on (you don’t say which one it is) – and you should contact the author. If it works fine, that’s a good sign it’s one of your other add-ons.
.3. If you can’t get Help > About to open, that’s a bigger problem here. You should disable all of your add-ons with #2 on the Troubleshooting Checklist (Troubleshooting - Anki Manual) and try to copy that again.