Getting an error "Invalid entries found. Please correct and submit again."

Getting an error "Invalid entries found. Please correct and submit again."

I already allowed edit access to the support team.

To reproduce the error:
https://creator.zoho.com/lexshan1/production-manager#Form:Order_form

Select the "test customer" and fill int he Address 1 line, click "Submit"

I'm still under trial period, if i don't get this issue resolved, there is no way I'll upgrade it.