We recently imported one of the projects into our JIRA instant from a different JIRA instant.
All works fine except an error says " An error occurred while loading the page" when we clicked on the issue types which are listed in the each project (please see the screen shot attached).
Error screen.PNG
This error occurs in all the projects available in our instant.
Can you please let us know, what might be causing this error in the application.
Please Note: we are using the JIRA of version 6.4.5
Thank you in advance.