{"id":2263,"date":"2025-10-09T13:52:12","date_gmt":"2025-10-09T17:52:12","guid":{"rendered":"https:\/\/commons.trincoll.edu\/moodle\/?p=2263"},"modified":"2025-10-09T13:52:12","modified_gmt":"2025-10-09T17:52:12","slug":"undefined-pop-up-error-in-moodle","status":"publish","type":"post","link":"https:\/\/commons.trincoll.edu\/moodle\/undefined-pop-up-error-in-moodle\/","title":{"rendered":"Undefined pop up error in Moodle"},"content":{"rendered":"\n<p>Moodle and TCOnline don&#8217;t play well together when you have tabs open for both at the same time. We are still investigating but here is what we can share.<\/p>\n\n\n\n<h2>The issue presents itself in a few different ways<\/h2>\n\n\n\n<ul><li>You may get a small pop up window that just says &#8220;undefined&#8221;.<\/li><li>You may see an error saying &#8220;request headers too large&#8221;.<\/li><li>You may see nothing unusual but a page just doesn&#8217;t load completely or doesn&#8217;t seem to work properly.<\/li><li>It occurs most often with Quickmail and the participants list in Moodle but it can happen on any page.<\/li><\/ul>\n\n\n\n<h2>What is the cause?<\/h2>\n\n\n\n<ul><li>It appears to be caused when a user has TCOnline tabs\/windows open in the browser at the same time as Moodle. The problem is caused by the TCOnline cookie.<\/li><li>It isn&#8217;t consistent, sometimes you can have TCOnline tabs and Moodle open without encountering any problems.<\/li><\/ul>\n\n\n\n<h2>What is the solution?<\/h2>\n\n\n\n<ul><li>Sometimes just closing the pop up and\/or refreshing the page is sufficient.<\/li><li>Closing the browser (not just the tabs) and reopening it seems to clear resolve it.<\/li><li>Just closing the TCOnline tabs may help but not always.<\/li><li>Using a private window for one of them or a different browser for each will also avoid the issue.<\/li><\/ul>\n\n\n\n<p>We have been working with MoodleUS and IT but don&#8217;t have any details about a solution at this point.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Moodle and TCOnline don&#8217;t play well together when you have tabs open for both at the same time. We are still investigating but here is what we can share. The issue presents itself in a few different ways You may get a small pop up window that just says &#8220;undefined&#8221;. You may see an error &hellip; <a href=\"https:\/\/commons.trincoll.edu\/moodle\/undefined-pop-up-error-in-moodle\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Undefined pop up error in Moodle&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[15],"tags":[],"_links":{"self":[{"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/posts\/2263"}],"collection":[{"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/comments?post=2263"}],"version-history":[{"count":1,"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/posts\/2263\/revisions"}],"predecessor-version":[{"id":2264,"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/posts\/2263\/revisions\/2264"}],"wp:attachment":[{"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/media?parent=2263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/categories?post=2263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/commons.trincoll.edu\/moodle\/wp-json\/wp\/v2\/tags?post=2263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}