3D FlipBook - 2 errors prevents the iframe from loading, only in Safari

Somehow i'm getting these two errors, only in Safari: https://www.dropbox.com/s/rqvtnk8v2qh2so2/Schermafbeelding%202021-03-26%20om%2015.45.03.png?dl=0

1: TypeError: (0,_libs.$) is not a function. (In '(0,_libs.$)("")', '(0,_libs.$)' is undefined) 2: Unhandled Promise Rejection: TypeError: instance.node.find(".book-widget div").FlipBook is not a function. (In 'instance.node.find(".book-widget div").FlipBook((0,_buildOptions2.default)(instance))', 'instance.node.find(".book-widget div").FlipBook' is undefined)

This prevents the iframe from loading. The

Any idea where those errors come form or how i can fix this?