Error After Salesforce Sandbox Refresh

Problem:

We recently refreshed our Salesforce Sandbox. On two of our flows (Salesforce Account to Customer and Salesforce Opportunity to Sales Order), I am receiving the following save error:

 I have tried closing the Integrator and reopening, but the error persists. Additionally, the Sync In Progress checkbox remains checked on some of the opportunities in our Salesforce sandbox. Perhaps it is unrelated, but I wonder if the checkbox is not clearing as a result of the flow error, and/or we are not able to save the flow in the Integrator because Celigo thinks it is still in progress. 

Solution:

Please refer to the following article for the steps that must be taken after a Sandbox refresh: 

Troubleshooting: Salesforce Full Sandbox Refresh (V2 SuiteScript Platform)

Follow the instructions and then uncheck the Sync In Progress on the Account record.  Resave the settings and sync again.