VT 7 Ubuntu 16.04 php7.1 Mail Manager not displaying emails

Complete fresh installs with all requirements met apart from php and display errors off, to many complaints so had to. Two Ubuntu severs and localhost

It is throwing an errors: Invaid request, Uncaught TypeError: Cannot read property 'split' of undefined, undefined mailids,

SyntaxError: expected expression, got keyword 'var' - var mailids = jQuery('input[name="folderMailIds"]').val();

loadMailContents : function(folderName){ var mailids = jQuery('input[name="folderMailIds"]').val(); mailids = mailids.split(",");

/layouts/v7/modules/MailManager/resorces/List.js line 309