The role is not issued when clicking on the reaction

问题

My exception says that user = null but I don't understand why? UserId is passed in the debugger

 private async Task ReactionAdd(Cacheable<IUserMessage, ulong> cache, ISocketMessageChannel socketMessageChannel, SocketReaction reaction)
            {
                if (reaction.MessageId == 771361839917170748)
                {
                    var emote = Emote.Parse("<:NepSmug:740928682310500412>").ToString();
    
                    if (reaction.Emote.ToString() == emote)
                    {
                        var sockettextChannel = socketMessageChannel as SocketTextChannel; 
                        
                            ulong roleid = 741342300499738715;
    
                            var role = sockettextChannel.Guild.GetRole(roleid);
                            var user = sockettextChannel.Guild.GetUser(reaction.UserId);
    
                            await user.AddRoleAsync(role);
                    }
                }
            }

回答1:

The user is null might caused by recent change on the Discrod API refer to this. The changes caused the Guild.User info is not downloaded properly.

1. First thing to check is if the User is assigned on Context.Guild or not (You can also verify if the user in your Discord server is equal on the Context.Guild.Users).
2. Second you need to enable this feature on your Discord Bot

来源：https://stackoverflow.com/questions/64604209/the-role-is-not-issued-when-clicking-on-the-reaction