When choosing the category for a topic please try to have a look at the category description for each category first:
The current used category is/was https://community.greenbone.net/c/vulnerability-tests (Description: About the Vulnerability Tests category) which is about vulnerability tests (the so called “NASL scripts”).
As you’re having a problem when running / scheduling a task within GVM which is completely unrelated to the vulnerability tests itself the category https://community.greenbone.net/c/gse (Description: About the Source Edition (GSE) category) needs to be chosen.
I have moved the topic to the correct category for now.