seafile ce install by docker cannot preview office document by onlyoffice

[ctwlty]

I install seafile6.3.4 ce today, and integration onlyoffice with docker onlyoffice/documentserver.the sethub_setting.py is as follow. I config it and restart. but still cannot preview docx,pptx and so on. I try nextcloud with the same onlyoffice server, everything okay. could you help check whether there were some problems with the docker

ENABLE_ONLYOFFICE = True
VERIFY_ONLYOFFICE_CERTIFICATE = False
ONLYOFFICE_APIJS_URL = 'http://my-only-office-ip/web-apps/apps/api/documents/api.js'
ONLYOFFICE_FILE_EXTENSION = ('doc', 'docx', 'ppt', 'pptx', 'xls', 'xlsx', 'odt', 'fodt', 'odp', 'fodp', 'ods', 'fods')
ONLYOFFICE_EDIT_FILE_EXTENSION = ('docx', 'pptx', 'xlsx')