Widevine CDM doesn't install

Hello, I have been using my raspberry pi 4 for video playback using LibreELEC, but want to connect it to a few streaming apps, which unfortunately use DRM. When I try to start the content, I get prompted to install Widevine CDM, but when I install it and wait, I get an error saying video playback failed, when trying again, it prompts me again to install Widevine, but no results. Nor does it install using the settings of InputStream Helper. How can I fix this?