While browsing the file manager from the cPanel the 404 not found error message is occur.
Not Found
The server was not able to find the document (./frontend/x3/index.html) you requested.
Please check the url and try again. You might also want to report this
error to your web hosting provider.whostmgrd/11.25
As per above error message x3 theme is causing the problem therefore simply move the x3 theme and resinstall it by running the upcp, you can rename the theme under which you are facing the problem.
linux@server[~]#cd /usr/local/cpanel/base/frontend
linux@server[~]#mv -v x3 x3-corrupt
linux@server[~]#/scripts/upcp –force
Now browse the file manager, it will work properly.
