# AA96 invalid aggregator

`AA96 invalid aggregator` is an ERC-4337 EntryPoint error that means the bundler submitted aggregated user operations with an invalid signature aggregator.

The bundler tried to bundle aggregated user operations with an invalid aggregator.

## Possible solutions

* If you are using a bundler provider like Pimlico, [reach out to them](https://t.me/pimlicoHQ).