Hi there! I see you're having trouble entering anything or navigating through the Hanna app on your Mac running macOS 10.15.7. Let's get this sorted out together.

To better assist you, could you tell me a bit more? For example:
- Does the app open but then you can't click or type anywhere?
- Does the app freeze or crash?
- Have you tried any steps so far like restarting the app or your computer?

Meanwhile, here’s a general step-by-step suggestion to troubleshoot this kind of issue:

1. Force Quit the App and Restart:
- Click the Apple menu (top-left corner) > Force Quit.
- Select the Hanna app and click Force Quit.
- Then reopen the app and check if you can enter or navigate.

2. Restart Your Mac:
- Sometimes a simple restart can resolve temporary glitches.

3. Check for App Updates:
- Open the App Store on your Mac.
- Click on Updates and see if Hanna app has an update available.
- Install if available and try again.

4. Clear App Cache or Preferences:
- Sometimes corrupted cache or preference files cause issues.
- Since you’re on macOS, go to Finder, press Cmd+Shift+G, type ~/Library/Containers/ look for the Hanna app folder and move it to Trash.
- Then relaunch the app (note: this may reset some app settings).

5. Reinstall the App:
- Delete the Hanna app completely and reinstall it from the App Store.

If the app still behaves the same way after these steps, it may be helpful to check if your system software is fully up to date beyond 10.15.7 or if there is any known compatibility issue.

Also, do you remember if this started after any update or change on your Mac or the app?

Let me know how these steps go or if you’ve already tried any of them, so I can guide you further!