Issue installing Collabora following official guide

The thread is kind of long, so I don’t know if I missed something…
Someone got an “Operation not permitted” link-error like the following fixed?
kit-03388-00 00:57:44.355999 [ loolkit ] link("/opt/collaboraoffice5.1/EULA.odt","/opt/lool/child-roots/3388/lo/EULA.odt") failed. Exiting. (errno: Operation not permitted)
Bernd