There is an error when I did the campaign sync from Marketo to Salesforce. I did this by Smart Campaign and added a flow step "Add to SFDC Campaign", and there was an error that occurred “CANNOT_EXECUTE_FLOW_TRIGGER: We can't save this record because the “(Create) Campaign Member” process failed. Give your Salesforce admin these details. <b>An unhandled fault has occurred in this flow</b><br>An unhandled fault has occurred while processing the flow. Please contact your system administrator for more information. Error ID: 1066016182-34305 (-1575471408)” Do you what happened, and how can I solve this?
Looks to me like your integration user doesn't have "Create" rights in SFDC since the description specifically calls out the "(Create) Campaign Member" portion of the workflow failing.
Did you share this with your SFDC Admin?
You could also look at lead record 1042166 to see if there's something odd or different about this record that might be an indicator as to why they failed to sync over.