Just started today, error: ManagerManager: An error has occurred: ReferenceError

the problem for me was the new TagCompleter is called before jquery loads from my server, on firefox it happens after new TagCompleter, I had same problem in other sites which loaded jqGrid, that was a big js script, it takes some time to be downloaded and parsed executed from browser, it seems script onload happens after document.onload event, so I need to test when a particular script is loaded with

if (script.readyState)
script.onreadystatechange = function(){
if (script.readyState == "loaded" || script.readyState == "complete"){ ....

to wait jquery is loaded, after I can intantiate TagCompleter

I have just experienced this problem - possibly caused by the fact that I have MODx installed on a subdomain? It was working when I set the site up, but now errors.

I run MODx on my main domain - this is working fine.

I have a separate installation of MODx within a sub-domain, and this is throwing the "TagCompleter" error when I click on a resource.

MODx version 1.0.3, MM 0.3.8, JQuery 1.3.2

Do I need to somehow amend the htaccess file within my manager folder on the subdomain?

For those who find this thread and are still having the problem with old versions of MODx Evolution, here’s how I fixed it on one of my sites: I disabled the .htaccess file in the /manager/ folder. (Evo 1.0.3)