I'm using sugarCRM version 6.5.20 which was installed on staging server (Linux) and my local machine (Windown 10) and it works just great but on the live server (Linux) the label missing, sometime label display well but when I refresh page it disappear again. Sometime the tab People and Companies are broken that it doesn't load anything and display error code 500 server.
I have read many guide to fix the error but it doesn't work. Someone please help me to resolve this problem. Thank you very much for any helps. (Sorry for my bad English).