@leocg
Thank you for trying to help but unfortunately that does not work. For some time now on Linux, Opera's widevine_config.json has had to be edited to point to the correct location of libwidevinecdm.so installed on the system. This has worked up until 66.0.3515.27 now it does not seem to be able to detect that widevine is already installed or be able to install / update widevine itself.

I have submitted a bug report about this issue here but have not heard back.

I am using Solus. I have seen other users mention the problem with newer releases occurring on Arch, Opensuse and Ubuntu. Hopefully something can be done to resolve this in the next release.