Class doesn't support Automation dhtmlxscheduler.js

Getting this error in IE8 only IE9+ and others working fine
error occurs on onclick, drag and other events

Class doesn’t support Automation
dhtmlxscheduler.js, line 121 character 468

js code
… &&(s[i]=scheduler._lame_clone(e[i],t)); …


Does this error occur in any snippet? If no, please provide with the demo where the problem can be reproduced.

Check the security settings. It is possible that Signed Active X usage is disabled on the problematic PC ( and it is the only way to use Ajax in case of IE8 )