29 March 2018
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The issue is related to some custom HubSpot field with the Number data type and data being stored in it. Please try detecting this field. For this, you can use Export package:
- create new Export package with HubSpot connection as a source;
- add new task, select Contacts table;
- select one column for export, e.g. start with the Id column;
- save the package and run it;
- continue adding columns to this export task one by one until the error is reproduced.
Also, if the proposed option doesn't suit you or you were not able to detect this field this way, we can run this package in the debug mode for more investigation.
Looking forward to your reply.