If you're not able to record with the desktop app or web app, here are the most common reasons and how to fix them.
Circleback doesn't have permissions
The Circleback app requires system level permissions to record your microphone (desktop and web), screen (desktop only), and system audio (desktop only). You can give Circleback these permissions through your system or browser settings.
macOS
Enable Microphone permissions from System Settings (instructions)
Enable Screen & System Audio Recording permissions from System Settings (instructions)
Windows
Enable Microphone permissions from Settings (instructions)
Enable Screenshots and screen recording permissions for desktop apps from Settings > Privacy & Security > Screenshots and screen recording