Issue Uploading and Extracting .h5p Files: Stored Compression Method Error

Submitted by nategz on Tue, 01/28/2025 - 21:19
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Bugs in content types

Hi,

7 years ago, we successfully ported the H5P Libraries into our platform build using ASP.Net, allowing us to render uploaded h5p packages downloaded from https://h5p.org/content-types-and-applications. In our code, we upload the .h5p file into our server and extract it into a folder using zip extractor (specifically, ICSharpCode.SharpZipLib). 

Recently, however, we have been encountering the following error message when attempting to upload the .h5p files downloaded from H5PP.org :

"'The combination of Stored compression method and Descriptor flag is not possible to read using ZipInputStream'"

Has there there any change on how H5P files are compressed into .h5p format? If so, could you please guide us on how to resolve this error on our end?

Thank you so much.