Unexpected Application Error!
Cannot read properties of undefined (reading 'push')
TypeError: Cannot read properties of undefined (reading 'push')
at https://www.digitalbook.io/static/js/67.2a1cdc02.chunk.js:2:36584
at f (https://www.digitalbook.io/static/js/67.2a1cdc02.chunk.js:2:28320)
at Generator.<anonymous> (https://www.digitalbook.io/static/js/67.2a1cdc02.chunk.js:2:29657)
at Generator.next (https://www.digitalbook.io/static/js/67.2a1cdc02.chunk.js:2:28683)
at v (https://www.digitalbook.io/static/js/67.2a1cdc02.chunk.js:2:35332)
at a (https://www.digitalbook.io/static/js/67.2a1cdc02.chunk.js:2:35535)