Problem nexcloud + docker

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Hello I have installed nexcloud 18 + centos 7 and onlyoffice in a docker when I want I want to enter the address of the service for document editing I have this error could help me to solve them, thanks to all

Nextcloud version : 18
Operating system and version _: centos 7
Apache 2.4.6)
PHP version: 7.3.19

Error al intentar establecer la conexi├│n (Client error: GET resulted in a 404 Not Found response: 404 Not Found

Not Found (truncatedÔÇŽ) ) (versi├│n 5.5)