Student cannot start the course, redirect to course directory

Hi Vibe themes, i was created course from admin panel (my self). Then i changed the name's author with the instructor. When student click the start course button, it always redirect to course directory page. Have i miss something? I followed the step from this discussion to check the javascript error (source tip from wordpress codex) and found error notification like this: Given URL is not allowed by the Application configuration: One or more of the given URLs is not allowed by the App's settings.  It must match the Website URL or Canvas URL, or the domain must be a subdomain of one of the App's domains. ping:1:51 JQMIGRATE: Logging is active jquery-migrate.js:21:2 JQMIGRATE: jQuery.fn.live() is deprecated jquery-migrate.js:41:4 console.trace(): jquery-migrate.js:43 migrateWarn() jquery-migrate.js:43 jQuery.fn.live() jquery-migrate.js:471 <anonymous> popup.js:172 m.Callbacks/j() jquery.js:2 m.Callbacks/k.fireWith() jquery.js:2 .ready() jquery.js:2 J() jquery.js:2 TypeError: doc.location is null content.js:102:7 TypeError: document.getElementById(...) is null ff-overlay.js:8:3 TypeError: doc.location is null content.js:102:7 TypeError: document.getElementById(...) is null ff-overlay.js:8:3 TypeError: gContextMenuContentData is null nsContextMenu.js:979:9 JQMIGRATE: Logging is active jquery-migrate.js:21:2 TypeError: hud is undefined hudservice.js:175:7 TypeError: this.transport is null main.js:1347:5 JQMIGRATE: jQuery.fn.live() is deprecated jquery-migrate.js:41:4 console.trace(): jquery-migrate.js:43 migrateWarn() jquery-migrate.js:43 jQuery.fn.live() jquery-migrate.js:471 <anonymous> popup.js:172 m.Callbacks/j() jquery.js:2 m.Callbacks/k.fireWith() jquery.js:2 .ready() jquery.js:2 J() jquery.js:2 TypeError: this.transport is null main.js:1347:5 NS_ERROR_FAILURE: Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIURI.host] ReqBlocker.js:47:0 What should i do? my student cannot start the course, always loop.