If you are experiencing the following issues today:
- Ext.grid.ColumnModel is not a constructor
- You are using a ServerProxy but have not supplied it with a url.
Chances are that you have pointed your script tags directly to the Sencha site. (http://dev.sencha.com/deploy/…). Sencha has recently updated their code located at “http://dev.sencha.com/deploy/dev” to version 4. Much of the API is not compatible with the earlier versions.
The fix for this is to download the extJS library and scripts to your own server and change the URL to reference them locally.