BIP2499
Severity
20 : Error
Message
(<insert_1>, <insert_2>) : Illegal arguments to SUBSTRING function called as <insert_3>.
Explanation
Valid syntax for SUBSTRING is: SUBSTRING( source_string FROM start_position [FOR string_length]). The function was called as <insert_3>.
Response
Correct the syntax of your ESQL expression in node <insert_1>, around line and column <insert_2>, then redeploy the message flow.