Hello! I understand you’re having trouble opening the Fleek Wholesale app on your Mac running OS X 10.15.7 and you’re seeing an error message. To help you better, could you please tell me what the exact error message says? Also, do you experience this problem immediately after clicking the app icon, or does it happen after a certain action?

Meanwhile, here are some initial steps we can try to troubleshoot your Fleek Wholesale app issue on macOS Catalina (10.15.7):

1. Force Quit and Relaunch:
Sometimes apps get stuck. Press Command+Option+Escape to open the Force Quit menu, select Fleek Wholesale if showing, then click "Force Quit." Try reopening the app afterwards.

2. Restart Your Mac:
A simple restart often clears minor glitches. Click the Apple menu and choose "Restart." After reboot, try launching the app again.

3. Check for App Updates:
Open the App Store, go to the Updates tab, and see if there’s an update available for Fleek Wholesale. Installing the latest version can resolve compatibility issues.

4. Check App Permissions:
Go to System Preferences > Security & Privacy > Privacy tab. Look for any permissions that the app might need, such as Files and Folders, and make sure Fleek Wholesale is allowed.

5. Clear App Cache / Reset Preferences:
- Open Finder and press Shift+Command+G to open "Go to Folder," then enter ~/Library/Containers/ and look for any folders related to Fleek or Fleek Wholesale.
- Move such folders to the Trash (this resets app data).
- Relaunch the app and see if it opens.

6. Check Console for Error Logs:
Open the Console app from Utilities and look for any error messages logged when you try to open Fleek Wholesale. This info can help narrow down the cause.

Could you try these and let me know what happens? If none works, please share the exact error message or any details you see so I can guide you further or escalate support.

Are you satisfied with these initial steps?