500 Error. Blank overlay. Fresh install 2.6.5

Fresh install for a new project. MIGX overlay is blank with following error in the console:

I've tried PHP 5.6 and 7

Any help gratefully received.


/assets/components/migx/connector.php:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
modx.jsgrps-min.js:4 Uncaught TypeError: this.mask.addClass is not a function
at S.onShow (modx.jsgrps-min.js:4)
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=f7e90b99:122)
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)
/assets/components/migx/connector.php:1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
modx.jsgrps-min.js:4 Uncaught TypeError: Cannot read property 'removeClass' of undefined
at S.onHide (modx.jsgrps-min.js:4)
at S.afterHide (ext-all.js:21)
at S.hide (ext-all.js:21)
at Object.hide (ext-all.js:21)
at Object.show (ext-all.js:21)
at MODx.onAjaxException (modx.js?v=f7e90b99:122)
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)

Solved by setting all the folders from assets/ to 755