Compose email-Templates,Modules,Send to - not loading


i am trying to compose an email but when i choose users to send to or email templates, they are not loading at all

Also if i choose to create an email instead of compose, it shows up the below message

Error: File [modules/Home/metadata/editviewdefs.php] is missing. Unable to create because no corresponding HTML file was found.

thanks in advance,

My version is
Version 7.11.4
Sugar Version 6.5.25 (Build 344)