Based on what you have provided, it seems that you have used the GrowwStacks modules before, and they were working fine previously.
This is likely due to the Auth Token expiring, and you would most likely need to get a new token from GrowwStacks.
Unfortunately we are unable to assist you further, as this integration is provided by an external service GrowwStacks, and the only way to get a new Auth Token is by contacting their customer support at https://www.growwstacks.com/contact-3