Running Duplicati - 2.0.7.1_beta_2023-05-25 and tried the two options above. Now get two warnings, “The supplied option --–no-backend-verification is not supported and will be ignored” and “The supplied option --–no-auto-compact is not supported and will be ignored”
Another thread suggested changing --backup-test-samples to zero, will try that and post an update to see if it resolves the problem with AWS Glacier