Server error Code: -32000

Trying to send BTC from multisig address. Getting this error since yesterday.
Help to understand the error,

Sorry, we got an error when trying to do the requested action: 'JSON-RPC Error:
Type: Server error
Code: -32000
Message: Non-hexadecimal digit found
’ (API method: create_send).
If this persists, please click on the question mark button on the top right-hand corner of the screen for support options.

you cant send btc to a multisig address from a counterparty wallet… its currently not supported