"Unfortunately when I revert class.nav.php to the original file, the same problem still occurs."Try to clear your browsers cache and restarting the webserver may help here ;)
Beside, can you provide more info what exactly you modified in the class.nav.php?I need to change top menu name like "Support Center Home", "Open a new ticket" and "Check ticket Status" to my language without having any option for end user to change language in my system. I just modified/change the name as seen on line 329 - 345 in the attached file.Well thanks for the advice I did clear the cache, I also try in another browser but still no luck at all.
[class.nav.zip](https://forum.osticket.com/assets/files/migrated/FileUpload/19/0b9f320db1c0f5526177ee826204c3.zip)