Invalid discovery rule value: cannot parse as a valid JSON object

[walter.kramer]

zabbix 4.2.3 on Amazon Linux AMI EC2 with python 2.7

https://share.zabbix.com/cloud/zabbix-cloudwatch-integration

imported template, created access key and now testing it
when activated a discoery rule this error appears
When we run the aws_discovery script with bash in terminal we get a nice JSON format with our EC2 instances for example.

Cannot find any solution so far, also cannot discover where the local logs appear on the zabbix server instance.

please help ?!