Collabora server retuns `Failed to open undefined, file not supported`

Steps to reproduce

1.setup ownncloud10
2.setup loolwsd + CODE for CnetOS7 on same server
3.connecting collabora server from woncloud 10

Expected behaviour

I can open document ,spreadsheet and presentation files after create them.
Also server shows icon for document ,spreadsheet and presentation

Actual behaviour

collabora server returns below when I try to open files after creating files
Failed to open undefined, file not supported.
And I can’t see icon.
Server just shows small tangle on the screen

Server configuration

Operating system:

Web server:
Apache2.4.27 SCL package


PHP version:
PHP 5.6.25 SCL package

ownCloud version: (see ownCloud admin page)

Have you tried to restart the Collabora server?

yes,i did.actually,loowsd haven’t log anything.