The code isn't changing the day, which causes the server to be stuck on the same day over and over. I just fixed this on my server. I can send you a link to fix this.

Merged post

Replace your VoteEnd Void with this:

private void VoteEnd(bool success)
        {            
            VoteOpen = false;
            RequiredVotes = 0;
            VotingTimer.Destroy();
            if (CountTimer != null) CountTimer.Destroy();        
            ReceivedVotes.Clear();
            TimeRemaining = 0;

            if (success)
            {
                DateTime newDate = server.Time.Date;
                TimeSpan newTime = TimeSpan.Parse(configData.Options.TimeToSet);
                newDate = newDate.AddDays(1);
                DateTime newDateTime = newDate.Add(newTime);
                server.Time = newDateTime;

                server.Broadcast($"{configData.Messaging.MainColor}{GetMSG("Skipping the Night.")}</color>");                
            }
            else
            {
                server.Broadcast($"{configData.Messaging.MainColor}{GetMSG("The attempt to skip the night has failed.")}</color>");
            }
            
            TimeCheck = timer.Once(configData.VoteTimers.TimeBetweenVotes * 60, () => CheckTime());
        }​

All you need to do is to replace those 2 lines:

                server.Time = server.Time.Date + TimeSpan.Parse(configData.Options.TimeToSet);
                server.Time.Date.AddDays(1);​

with this one line:

                server.Time = server.Time.Date.AddDays(1) + TimeSpan.Parse(configData.Options.TimeToSet);

Hope @k1lly0u will see this :)

MONaH

All you need to do is to replace those 2 lines:

                server.Time = server.Time.Date + TimeSpan.Parse(configData.Options.TimeToSet);
                server.Time.Date.AddDays(1);​

with this one line:

                server.Time = server.Time.Date.AddDays(1) + TimeSpan.Parse(configData.Options.TimeToSet);

Hope @k1lly0u will see this :)

Build is currently failing, so can't merge it until that is resolved.

  SkipNightVote.cs(137,60): error CS0201: Only assignment, call, increment, decrement, await, and new object expressions can be used as a statement

still not fixed?

timed events will fix all this 

Can confirm that MONaH's proposal works. I submitted a patch with the changes outlined above.