Dataprep Webhook Limits and Cannot update column with Dataprep

Dataprep Webhook Limits and Cannot update column with Dataprep

I have two problems : 

1 - I am using Airflow to trigger my pipeline, and when I tested it, it worked fine a couple of times. However, after that, I received an error: {"code":429,"message":"Request rate limited"}. I didn’t send too many requests — maybe only 6-7 successful requests within 20 minutes — yet my requests were still rate-limited. How can I solve this?

2 -  
I am updating the CRM's lead data using Dataflow. I can update every column except for a date column, which is not updating. Also, in DataPrep, there are no errors related to targeting or data type.