No issue here, everything working fine. My Chrome browser version is 68.0.3440.106 bites, Firefox see the picture. Probably another program blocked your browser indexedDB function.
The database is stored in the browser, it is only used for displaying callsigns and information in the Status page's call log. The openSPOT does not have enough onboard flash memory to store the database.
Norbert Varga, HA2NON