IamRoleLambdaExecution - Policy statement must contain resources

Whenever using serverless-wsgi and deploying I get the following error:

An error occurred: IamRoleLambdaExecution - Policy statement must contain resources. (Service: AmazonIdentityManagement; Status Code: 400; Error Code: MalformedPolicyDocument; Request ID: xxxxxxxx-xxxx; Proxy: null).

Anyone can help me fix it?