Peer conection error spreedme

Only when new user added

i have this in my server.conf

[http]
listen = 127.0.0.1:8080
basepath = /webrtc
root = www

[https]

[app]
stunuris = stun:stun.spreed.me:443

i need tell you, im using this https://github.com/nextcloud/vm for install all NC, spreedme and collabora

https://goo.gl/mMPJAt, video show your suggest

pls referr to this process and commands

this is log of spreed-webrtc-server

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