As I cannot see any reference on how to use properly the sysparm_query_category, may I confirm on how did you append the sysparm_query_category in get request?
Added below line of codes. I hope someone can help and guide me as I'm new to ServiceNow. Thanks!
from pysnow import Client
...
resource = self.client.resource(api_path=F"/table/{table}")
resource.parameters.add_custom({"sysparm_query_category": "cat_read_generic"})
request = resource.get(query=query, fields=fields)
https://developer.servicenow.com/dev.do#!/reference/api/sandiego/rest/c_TableAPI
I am not aware
pysnow
API. I hope this helps. Else refer to the comment above.