Please use ucc-bin instead of ucc-bin-linux-amd64. The amd64 executables are really poor quality wise, and offer no benefit. I hear it's known that these have problems with webadmin, on both windows and linux.
What you are trying to do with the options won't work and doesn't make sense. Options are meant to be used within xVoting, and nowhere else. If you want to change the startup-values for these settings please do it within server.ini directly.
While i'm at it, i strongly suggest using XAdmin.AccessControlIni as AdminControlClass. It enables you to store multiple admin credentials within XAdmin.ini, and becomes necessary if you try to implement ReservedSlots with ServerExts. XAdmin can be shared by both servers.
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