TooManyPendingExtrinsics

A chain-side capacity limit was hit; reduce the size or count of the request

store_encrypted was rejected because the shield pallet's queue of encrypted extrinsics is already at capacity. Compare the PendingExtrinsics count against MaxPendingExtrinsicsLimit and wait for queued items to be processed or expire.

Declared by the MevShield pallet; it classifies to the semantic code limit_exceeded.

Remediation

A chain-side capacity limit was hit; reduce the size or count of the request

The same explanation is available in the terminal: btcli explain TooManyPendingExtrinsics.