ODH 1.10 opens to a blank screen on Win 8.1

The only log record that appears is

[info][OculusDeveloperHub][2021-08-02T14:38:07.276Z] [[{"found":false,"key":"sandbox","path":"C:\\Users\\myusername\\AppData\\Roaming\\odh\\odh-config.json","type":"odh_read_config"}]]

I checked the odh-config.json just out of curiosity and the file is empty. The system is Win 8.1