Error: UUID is empty

Settings example:
UUID ffb640ac-11b7-737d-3823-c9efb26de4fc
WS_PATH /wztjfkwf
XHTTP_PATH /86pt9tgu

WebSocket config.json:
https://mega-1i4.pages.dev/wztjfkwf/?fragment=true&uuid=ffb640ac-11b7-737d-3823-c9efb26de4fc

XHTTP config.json:
https://mega-1i4.pages.dev/86pt9tgu/?fragment=true&uuid=ffb640ac-11b7-737d-3823-c9efb26de4fc

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