Can not 'edit' anything after upgrated to concrete5 5.6.0.1

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I am sort of frustrated. After upgrated to version 5.6.0.1, I can not edit anything. When i clicked the 'edit' button, the 'edit' window opens but shows NOTHING at all. I reinstalled it and the problem is still there, so I re-installed it again by thrown everything I created to the website, no help at all. Could any one help me out? It'll be very much appreciated!

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