pdf_reading_freeze

Problem/Motivation

the pdf loads and displays but you cannot turn pages it's frozed.

Steps to reproduce

have an existing site on drupal 8.7 with pdfs working and update it to drupal 9 and change flipping_book to flipbook.

Proposed resolution

searching for resolution not found yet help required

Remaining tasks

Find the solution

User interface changes

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API changes

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Data model changes

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