Messages Fetch Fix

Not using endpoint messages,
using search endpoint

src/managers/MessageManager.js

@@ -2,10 +2,11 @@
 
 const { Collection } = require('@discordjs/collection');
 const CachedManager = require('./CachedManager');
-const { TypeError } = require('../errors');
+const { TypeError, Error } = require('../errors');
 const { Message } = require('../structures/Message');
 const MessagePayload = require('../structures/MessagePayload');
 const Util = require('../util/Util');
+const BigNumber = require('bignumber.js');
 
 /**
  * Manages API methods for Messages and holds their cache.
@@ -216,8 +217,19 @@ class MessageManager extends CachedManager {
       if (existing && !existing.partial) return existing;
     }
 
-    const data = await this.client.api.channels[this.channel.id].messages[messageId].get();
-    return this._add(data, cache);
+    // const data = await this.client.api.channels[this.channel.id].messages[messageId].get(); // Discord Block
+    // https://canary.discord.com/api/v9/guilds/809133733591384155/messages/search?channel_id=840225732902518825&max_id=957254525360697375&min_id=957254525360697373
+    const data = (
+			await this.client.api.guilds[this.channel.guild.id].messages.search.get({
+				query: {
+					channel_id: this.channel.id,
+					max_id: new BigNumber.BigNumber(messageId).plus(1).toString(),
+					min_id: new BigNumber.BigNumber(messageId).minus(1).toString(),
+				},
+			})
+		).messages[0]
+    if (data) return this._add(data[0],	cache);
+    else throw new Error('MESSAGE_ID_NOT_FOUND');
   }
 
   async _fetchMany(options = {}, cache) {

src/structures/Message.js

@@ -211,14 +211,16 @@ class Message extends Base {
        * All valid mentions that the message contains
        * @type {MessageMentions}
        */
-      this.mentions = new Mentions(
-        this,
-        data.mentions,
-        data.mention_roles,
-        data.mention_everyone,
-        data.mention_channels,
-        data.referenced_message?.author,
-      );
+      if (!data.mentions)
+				this.mentions = new Mentions(
+					this,
+					data.mentions,
+					data.mention_roles,
+					data.mention_everyone,
+					data.mention_channels,
+					data.referenced_message?.author,
+				);
+      else data.mentions instanceof Mentions ? this.mentions = data.mentions : this.mentions = null;
     } else {
       this.mentions = new Mentions(
         this,