I created a workbook with about 20 pages. Originally the preview was working, but now it fails with the following error visible in the browser console.

jquery.js?version=1.27:2 Uncaught TypeError: Cannot read properties of undefined (reading 'taskDone')

at h5p-interactive-book…sion=1.11.8:2:73442

at Array.forEach (<anonymous>)

at u.createColumns (h5p-interactive-book…sion=1.11.8:2:73276)

at new u (h5p-interactive-book…sion=1.11.8:2:69981)

at new g (h5p-interactive-book…sion=1.11.8:2:89768)

at H5P.newRunnable (h5p.js?version=1.27:939:16)

at HTMLDivElement.<anonymous> (h5p.js?version=1.27:137:24)

at S.each (jquery.js?version=1.27:2:2976)

at S.fn.init.each (jquery.js?version=1.27:2:1454)

at H5P.init (h5p.js?version=1.27:93:60)