Error after upgrade to OJS 3.0.1.0

I cannot do anything after upgraded to OJS3.0.1.0. Everytime i click any button, message as below appeared. please help.

{“status”:true,“content”:"\n\n\t\t\tHelp\n\t</a>\n\n

Hi @MYTRIBOS_Malaysia,

Check the Javascript error console in your browser for errors before this issue appears.

Regards,
Alec Smecher
Public Knowledge Project Team