Errors/Chain errors
TooManyFreezes
A chain-side capacity limit was hit; reduce the size or count of the request
The account already has the maximum number of balance freezes, so a new freeze cannot be added. Check the account's Freezes entry against the MaxFreezes constant; an existing freeze must be thawed first.
Declared by the Balances 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 TooManyFreezes.