No suction Roomba 860 less than one year old

The suction has quit on our roomba 860 we’ve had for less than a year. The beaterbars are flinging some debris into the canister, but the majority of hair, dust, etc. just sits on the cusp of the canister so when you go to empty it all the debris spills everywhere (fun).

After a cursory search I haven’t found any links or similar questions.

How do we fix this??