You are attempting to Validate a Certificate and get an error "Error creating new certificates:....Signed/Expiration date mismatch. Signed date YYYY-MM-DD must be on or before the provided expiration date YYYY-MM-DD." indicating it could not be created.
- Review the dates, the signed date has to be earlier (or the same date as) the expiration date.
- Correct the dates
- Finish processing the Stack