Taking a look at the specific error message from Salesforce listed within the ‘Unable to Push to Salesforce’ popup is a great place to start because you can see the actual message that was passed from your Salesforce.
For more help, click the hyperlink associated with the specific action you were attempting to make:
- Salesforce push as Account error troubleshooting
- Salesforce push as Contact error troubleshooting
- Salesforce push as Lead error troubleshooting