Gallery dissappeared

Getting VM474:1 Uncaught SyntaxError: Unexpected identifier
at Object.<anonymous> (GALLERIA_CLASS_PROTOTYPE.js?ver=5.2.3:1071)
and GALLERIA_CLASS_PROTOTYPE.js?ver=5.2.3:55 Uncaught TypeError: Cannot read property ‘substr’ of undefined
at GALLERIA_CLASS.load_thumb_images (GALLERIA_CLASS_PROTOTYPE.js?ver=5.2.3:55)
errors. Gallery no longer listed in the Admin area

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