H5P Interactive book does not show a submit button

Test 1: H5P activity Login as admin Create a course and enroll a student it Create an H5P activity using the provided  interactive_book.h5p  as the package Note: make sure that post_max_size and upload_max_filesize in php.ini are set to a something larger than the file's size. Access the H5P activity to deploy the libraries. Wait until the page is fully loaded. Login as the student and access the H5P activity Click on the "Read" button Answer the two questions from the first page of the book Click on the "Summary & submit" button at the bottom of the interactive book index (usually in the left part of the content). Check the "Submit Report" button appears (should be a green button near the "restart" one). Click on the "Submit Report" button Check that the button region is replaced by a notice "Your answers are submitted for review!" Click the activity name in the breadcrumb to go again to the activity start Check the link "view my attempts" is displayed on top of the content Click on the "view my attempts" link Check the attempts report has 1 attempt registered (will appear in both tables) and has some duration and score. Test 2: Content bank Login as admin Go to the content bank and upload the provided  interactive_book.h5p Open the interactive_book.h5p content Answer the two questions from the first page of the book Click on the "Summary & submit" button at the bottom of the interactive book index (usually in the left part of the content). Check the "Submit Report" does NOT appear near the "restart" button.