Error: UUID is empty

Settings example:
UUID fc54fbb1-a211-f06a-17d7-5e0e7b318574
WS_PATH /dwv3bt70
XHTTP_PATH /v1cc9dqj

WebSocket config.json:
https://mega-1i4.pages.dev/dwv3bt70/?fragment=true&uuid=fc54fbb1-a211-f06a-17d7-5e0e7b318574

XHTTP config.json:
https://mega-1i4.pages.dev/v1cc9dqj/?fragment=true&uuid=fc54fbb1-a211-f06a-17d7-5e0e7b318574

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