chainsaw is chewing up the chain

Hello everyone

Have a chainsaw, and its chewing up the chain. I have had 2 chains in there now and it done the same thing. The chain will not fit into the bar anymore. please see photos

The drive sprocket on the clutch drum is absolutely worn out and damaging the chain drive links that badly they are binding in the bar rails.
Were you having "issues" recently, so replaced an old worn out bar and chain?
If so it is likely the drive sprocket or spur is just as worn and probably near cut through and also needs replacing- along with new chain/chains.

Unless- you have bought replacements for the bar and chain and mismatched gauge- trying to run a .325 chain on a 3/8 driver- or 3/8 chain on a .325 driver.