OpenSSH v10.0 no longer automatically falls back to built-in MODP DH groups if a moduli file exists. Using custom moduli will cause the web front-end to fail with the message "Error while getting results from server. Please try again later." Removing the moduli file (and falling back to the built-in RFC3526 groups), or using the default Debian moduli file resolves the issue and generates a report immediately. No apparent issue is seen using v3.3.0 of the command-line tool.