Unable to process template language expressions for action 'Condition' at line '1' and column '17592': 'The template language function 'contains' expects its first argument 'collection' to be a dictionary (object), an array or a string. The provided value is of type 'Null'.'.
Hi @Anonymous,
Can you share a couple of screenshots of your flow configuration?
Based on the error I would say that it looks like the field you are checking with a contains function is empty. You could workaround this by implementing if and empty functions in your check.
Below is an example of such an expression.
Replace outputs('Get_items')?['body/value'] by your field.
if(empty(outputs('Get_items')?['body/value']), 'It is empty', contains(outputs('Get_items')?['body/value'], 'Check for a value if not empty'))