Check the status, not the guess
Start with the status shown in the product: the channel list, the usage bar, the task state. Blivo shows the true state of things — if a channel says not connected, that is the answer to why messages aren't flowing.
Common fixes
Login problems and verification emails have their own articles in Account. For channels, reconnecting from the channel's settings page re-validates credentials with the provider.
Nothing is silently lost
If AI work paused — usage, approvals, a channel — it paused visibly and safely. The state is shown, the work waits, and nothing is deleted behind your back.