The ..::LvL LiveView system has failed to load a required browser feature. That feature was indexedDB.
Best guess why:
Either way, ..::LvL LiveView requires indexedDB to function correctly.
For now, the only is choice to head back to ..::LvL.
LiveView uses the QuakeJS engine (source code) and a slighly modified version of ZTM's Flexible HUD (source code).