Fix error trim is not a function from commit bac5c2e83b

api/js/etemplate/et2_core_arrayMgr.ts

@@ -125,7 +125,7 @@ export class et2_arrayMgr
 	 * @return {string[]}
 	 */
 	explodeKey(_key: string): string[] {
-		if(!_key || _key.trim() === "") return [];
+		if(!_key || typeof _key == 'string' && _key.trim() === "") return [];
 
 		// Parse the given key by removing the "]"-chars and splitting at "["
 		let indexes = [_key];