Fix Webembed

Report by PinkDuwc._#3443

package.json

@@ -1,6 +1,6 @@
 {
   "name": "discord.js-selfbot-v13",
-  "version": "1.3.5",
+  "version": "1.3.6",
   "description": "A unofficial discord.js fork for creating selfbots [Based on discord.js v13]",
   "main": "./src/index.js",
   "types": "./typings/index.d.ts",

src/structures/WebEmbed.js

@@ -227,7 +227,7 @@ class WebEmbed {
 	 * @returns {MessageEmbed}
 	 */
 	setImage(url) {
-        if (this.thumbnail.url) {
+        if (this.thumbnail && this.thumbnail.url) {
 			console.warn('You can only set image or thumbnail per embed.');
 			this.thumbnail.url = null;
 			this.imageType = 'image';
@@ -242,7 +242,7 @@ class WebEmbed {
 	 * @returns {MessageEmbed}
 	 */
 	setThumbnail(url) {
-        if (this.image.url) {
+        if (this.image && this.image.url) {
 			console.warn('You can only set image or thumbnail per embed.');
 			this.image.url = null;
 			this.imageType = 'thumbnail';