vino's spec file's scripts are all missing parameters.
while it's missing the service name parameter all should have to be fixed to:
This should be fixed as a part of the planned desktop rebase in RHEL-7.6.
I've fixed that in Fedora already:
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.