[FIX] Result of get avatar from url can be null (#16123)

app/lib/server/functions/setUserAvatar.js

@@ -17,6 +17,10 @@ export const setUserAvatar = function(user, dataURI, contentType, service) {
 
 		try {
 			result = HTTP.get(dataURI, { npmRequestOptions: { encoding: 'binary', rejectUnauthorized: false } });
+			if (!result) {
+				console.log(`Not a valid response, from the avatar url: ${ dataURI }`);
+				throw new Meteor.Error('error-avatar-invalid-url', `Invalid avatar URL: ${ dataURI }`, { function: 'setUserAvatar', url: dataURI });
+			}
 		} catch (error) {
 			if (!error.response || error.response.statusCode !== 404) {
 				console.log(`Error while handling the setting of the avatar from a url (${ dataURI }) for ${ user.username }:`, error);
@@ -26,12 +30,12 @@ export const setUserAvatar = function(user, dataURI, contentType, service) {
 
 		if (result.statusCode !== 200) {
 			console.log(`Not a valid response, ${ result.statusCode }, from the avatar url: ${ dataURI }`);
-			throw new Meteor.Error('error-avatar-invalid-url', `Invalid avatar URL: ${ dataURI }`, { function: 'RocketChat.setUserAvatar', url: dataURI });
+			throw new Meteor.Error('error-avatar-invalid-url', `Invalid avatar URL: ${ dataURI }`, { function: 'setUserAvatar', url: dataURI });
 		}
 
 		if (!/image\/.+/.test(result.headers['content-type'])) {
 			console.log(`Not a valid content-type from the provided url, ${ result.headers['content-type'] }, from the avatar url: ${ dataURI }`);
-			throw new Meteor.Error('error-avatar-invalid-url', `Invalid avatar URL: ${ dataURI }`, { function: 'RocketChat.setUserAvatar', url: dataURI });
+			throw new Meteor.Error('error-avatar-invalid-url', `Invalid avatar URL: ${ dataURI }`, { function: 'setUserAvatar', url: dataURI });
 		}
 
 		encoding = 'binary';