I've just freshly installed an author instance.
I'm trying to access http://localhost:4502/crx/explorer/index.jsp to add a system user.
However, I'm unable to access the page. This is the error I'm getting trying to access the link.
Any help would be much appreciated. Thanks!
Can you restart the instance via start.bat file and open crx/explorer once you get the below message in the command prompt.
*INFO * [main] Startup completed
Try this and let me know if you still facing the same issue.
You can try recompiling the JSPs from host:port/system/console/slingjsp to see if helps.
In case you still see the issue, please raise a support ticket here : https://daycare.day.com/home/createaticket.html to investigate the NullPointerException.