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Modx 2.7.2 babel not working blank page

Hello i have ecently installed modx 2.7.2
After installing and configuring babel like i was doing in modx 2.7.1 the BABEL admin page showing blank manager/?a=index&namespace=babel

Also whenever i try to created a translation for a new resource am getting the same blank page.

The console is showing the following javascript message:

 modx.jsgrps-min.js:1 Uncaught TypeError: this.mask.addClass is not a function
at S.onShow (modx.jsgrps-min.js:1)
at S.afterShow (ext-all.js:21)
at S.show (ext-all.js:21)
at Object.show (ext-all.js:21)
at MODx.onAjaxException (modx.js?v=fb800b4b:122)
at h.Event.fire (ext-all.js:21)
at Ext.data.Connection.fireEvent (ext-all.js:21)
at Ext.data.Connection.handleFailure (ext-all.js:21)
at f (ext-base.js:21)
at m (ext-base.js:21)

Please help. Thanks in advance!

Are you getting this error message in reports–>error log and is this the full error message? Sounds like a mod_security problem or permissions