Checking for updates won't go away

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Just upgraded a site from 5.4 to 5.5.2.1 sad to say the "Checking for updates" spinner will not go away despite other posts on the forums to define('ENABLE_APP_NEWS',false) ... this window will not go away and presents errors in the javascript console..



Uncaught TypeError: Cannot call method 'hideLoader' of undefined ccm.app.js:1
Uncaught TypeError: Object #<Object> has no method 'easeOutExpo' /index.php/dashboard/:4

DavidMIRV