Workshop activated = Server crash...

Hello.

When im using workshop +host_workshop_collection 410856698 -authkey XXX the server crashes when i shut it down. When trying to forces the server to shut down it crashed. it then creates a chrash log. When i disable workshop the server shutsdown and saves everything and no crashlog is created.

This is the log: http://www.mediafire.com/download/8tjv926uev3q23a/srcds_2117156_crash_2015_3_28T14_34_49C0.mdmp
Im running the server on WINDOWS 8.1

Can anyone help me?
I dont know how to read logs and need help to fix this.

Thanks!

Gurk