Error: UUID is empty

Settings example:
UUID eff0e747-5084-8590-0e0e-4692dc3eed07
WS_PATH /ugsewptn
XHTTP_PATH /vjihqev4

WebSocket config.json:
https://giga-bkx.pages.dev/ugsewptn/?fragment=true&uuid=eff0e747-5084-8590-0e0e-4692dc3eed07

XHTTP config.json:
https://giga-bkx.pages.dev/vjihqev4/?fragment=true&uuid=eff0e747-5084-8590-0e0e-4692dc3eed07

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