Step 1: Once you have updated to macOS 15 Sequoia install the newest version of Suite. (NOTE: Even if you were already on the newest version, you will need to install Suite again after updating to Sequoia)
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​Step 2: Open System Preferences and go to Privacy & Security

Step 3: Force quit the Suite application

Step 4: Return to System Preferences > Privacy & Security > Click "Allow" and "Not Now" until you see the image in Step 5.

Step 5: Click "Restart"

Step 6: Once your computer restarts, launch the Suite application and you should see the login page.