Work down this list in order. The first four cover almost everything.
"Please select source phone numbers from dialer settings"
You have no number to call from. Open Power dialing configs on the dialer and pick at least one under Source phone number. If the list is empty, buy a number — see Buy and manage phone numbers.
This also appears when you dial from Scheduled calls or MissedCalls, because those screens start a session for you and inherit your dialer settings.
"Dialer is still loading, please wait a moment and try again"
The audio client has not finished registering. Wait a few seconds and retry.
If it persists: "Dialer failed to initialize. Please try again." Reload the page. If it still fails after a reload:
- Check the microphone permission on the padlock icon in the address bar.
- Close any other tab or the Chrome extension window running a session — they compete for the same device.
- Disable a VPN or corporate proxy and try again.
"Insufficient minutes. Your trial period has ended."
Your trial is over, or you are out of credits. See Trials and Credits and auto-refill.
"Not enough credits"
Top up, or turn on auto-refill so this stops happening.
"Device not ready" / no audio device
The browser has not handed the dialer a microphone. Grant the permission, reload, and confirm the correct device is selected in your system sound settings. Wired USB headsets are the reliable case.
"No active session"
An action needs a running session — adding a participant, dropping a voicemail, saving wrap time. Start a session first.
"Authentication required. Please sign in again."
Your session expired. Sign in again. If it recurs within minutes, your browser is blocking cookies for the site.
"No more contacts queued"
Not an error — the filtered list is exhausted. Your filters are hiding the rest. Contacts dispositioned Bad Number, No Answer, Negative, Not In Service or Do Not Call are hidden unless you select those dispositions explicitly, and the local-time window filter drops contacts as the day moves. See Filter who gets dialed.
"No number available"
The number search found nothing for that area code or zip. Try a neighbouring area code, or search by zip instead.
The dialer is greyed out entirely
You have no seat. An admin assigns one from Subscription → Seats. See Plans, seats and team members.
Still stuck
Note the exact message, the time, and the contact or number involved, and send them to support. The time matters — it is how the call is found in the logs.