[fusillator]

hi, you save me a lot of sleeping hours. it's strange no dependency is set. thank you so much, where do you find it was a requisite?

It's a bit of a known issue for folks that deal with Widevine on ARM platforms, Google started pushing this newer Widevine in May with the eventual intent to revoke the older versions.  However the revocation didn't start happening until recently, Amazon is one of the major streamers that has revoked the older Widevine versions at the start of September (I don't think Disney+ or Netflix has done it yet).  LibreELEC, CoreELEC, and XBian were pretty early adopters of the patched C libraries to support the newer Widevine.

I think since Amazon revoked the older version, OSMC & Raspberry Pi OS are now offering these patched C libraries which work with Widevine.  You can read more about it at:
https://www.matthuisman.nz/2021/05/widev...roken.html

Matt did a nice job tracking some of the major Kodi-focused OS distributions and their status.  However, other operating systems like Debian, Ubuntu, Fedora, and Arch probably will not pick up these patches, so those users basically have to build their own patched libraries.  It only affects ARM platforms, and one of the key indicators are what you noticed:
1. Widevine fails to load
2. It appears to not be a dynamic executable (this is in particular why you need a patched C library)

Interesting. I confirm Raspbian 10 provides the patched glibc and the new release of libwidevine in the official repository. Not sure why I didn't solve downgrading the library with InputStreamHelper but maybe i had messed up the library manually. Anyway now it works again nonetheless the evil google. Thanks again for your precious help.