The I2B2 CRC reported an internal error.
The I2B2 CRC at one of the adapters is responsive but reported an internal error as a response to a query. The CRC may have supplied a message with some helpful information.
If you are a user, supply all details to your site admin who can work with the adapter admin to resolve the issue.
If you are the adapter admin, check for a message from the CRC in the details and the CRC logs.