ERROR: Custom Values must be a valid JSON

Hi @Lucas_Silvano, welcome to the community! I am sorry to hear you’re having trouble here.

Unfortunately I am not a regular Monday.com user, so don’t quite know what kind of data structure this service requires.

Can you narrow down the problem a little bit? How does the JSON data look like you’re sending to your Monday.com node performing the update? What data type would the column e_mail in your Monday.com table?

You might also want to check out the existing posts about this topic, could it be that you simply need to adjust your data structure as described in this existing thread?