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Commands with require pinging users sometimes don't work

See original GitHub issue

System.NullReferenceException: Object reference not set to an instance of an object.
   at Discord.WebSocket.SocketGuildChannel.GetPermissionOverwrite(IRole role)
   at Discord.Permissions.ResolveChannel(IGuild guild, IGuildUser user, IGuildChannel channel, UInt64 guildPermissions)
   at Discord.WebSocket.SocketTextChannel.<get_Users>b__13_0(SocketGuildUser x)
   at System.Linq.Enumerable.WhereEnumerableIterator`1.ToArray()
   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)
   at System.Collections.Immutable.ImmutableArray.CreateRange[T](IEnumerable`1 items)
   at System.Collections.Immutable.ImmutableArray.ToImmutableArray[TSource](IEnumerable`1 items)
   at Discord.WebSocket.SocketTextChannel.get_Users()
   at Discord.WebSocket.SocketGuildChannel.Discord.IChannel.GetUsersAsync(CacheMode mode, RequestOptions options)
   at Discord.Commands.UserTypeReader`1.<Read>d__0.MoveNext()

It happens to random users, never to me. One person said that it was temporarily fixed when they removed all roles form themselves and readded them back, but I wouldn’t count on it. Looking at the code, it could be either that the EveryoneRole is somehow null at line 128, or that the GetRole on line 138 in Permissions.cs returns null.

Also, it has been happening for a very long time.