Unusable / constant buffering since 2021-12.1 / latest Widevine

Hi FaustoGSR,
No, I’m on a Vero 4K+ and my inputstream.adaptive add-ons (Netflix, VRT Nu) are absolutely unwatchable.
Nigel92 proposed up/downgrading inputstream.adaptive, but I haven’t succeeded so far, getting the following error:

2022-01-16 21:20:32.535 T:5445    ERROR <general>: CAddonInfoBuilder::Generate: Unable to load 'zip://%2fhome%2fosmc%2finputstream.adaptive-19.0.2-Matrix.zip/inputstream.adaptive-19.0.2-Matrix/addon.xml', Line 0
                                                   Failed to open file

The zip isn’t corrupt (it shows the contents via the Kodi file browser), so unclear why it doesn’t install…