To resolve the issue with the Brass app not loading and displaying an error, follow these detailed steps:

1. Update the App:
- Open the App Store on your Mac.
- Go to the 'Updates' section and check if there’s an update available for the Brass app. If there is, install the latest version.

2. Restart Your Device:
- Click on the Apple logo in the top left corner of your screen.
- Select "Restart" and wait for your device to reboot. This may resolve temporary glitches that affect app performance.

3. Check Internet Connection:
- Ensure that your device is connected to a stable internet connection.
- You can do this by trying to browse a website in your web browser.

4. Clear App Cache (if possible):
- As there is no built-in method for clearing cache on macOS like there is on other platforms, consider deleting and reinstalling the app if it continues to malfunction. This is a common step for many app-related issues.

5. Reinstall the App:
- Open the Applications folder and locate the Brass app.
- Drag the app to the Trash, then empty the Trash.
- Reinstall the app from the App Store.

6. Check System Requirements:
- Visit the Brass app page on the App Store to verify that your current macOS version (10.15.7) is compatible with the app. Sometimes, apps require newer versions of macOS to function properly.

7. Reset Network Settings Again:
- Since resetting your network settings didn't help initially, try resetting them again.
- Go to System Preferences > Network > (Select your active connection) > click on the 'Advanced' button > 'TCP/IP' tab > click 'Renew DHCP Lease'.
- Restart your device once more after making these changes.

8. Look for Known Issues:
- Search online to see if other users are experiencing similar issues with the Brass app. This can often provide insight or solutions that are currently being discussed in the community.

9. Contact Support:
- If the problem persists after following these steps, consider reaching out to Brass's customer support or checking the relevant community forums for assistance.

These steps provide a systematic approach to resolving the application loading issue. If all else fails, keeping track of updates from the app developers regarding known issues may also help in finding a resolution. - learn more - learn more - learn more