Hi! I understand you're seeing a "no connection" error when trying to log into the pCloud app on your Mac running OS X 10.15. Let's get that sorted out together.

To start, could you tell me if your internet connection is working fine otherwise? For example, can you browse other websites or apps without issues?

In the meantime, here are some simple steps to try:

1. Check Internet Connection: Make sure your Mac is properly connected to the internet.

2. Restart pCloud App: Quit the pCloud app completely and reopen it.

3. Update the App: Ensure you have the latest version of the pCloud app installed compatible with OS X 10.15. Sometimes outdated versions may face connectivity issues.

4. Reinstall pCloud: If updating does not help, try uninstalling and then reinstalling the pCloud app. This has helped others resolve login connection errors.

5. Disable VPN or Security Apps Temporarily: If you use any VPN, firewall, or security/cleaning apps, they might be interfering. Try disabling them and attempting login again.

6. Restart Your Mac: A simple reboot can sometimes resolve network-related glitches.

If you’ve already tried some of these, please let me know which ones, and we can explore deeper troubleshooting steps.

Also, does the "no connection" error happen right away when you open the app, or after entering your login details?

Let me know so I can guide you the best I can!