Netflix, what can I do?

For some time now I have only been shown Netflix originals on Netflix and when I search for certain series it says that a connection to Netflix could not be established. To be honest, that's quite annoying…, oh yes, it also says that this series is currently not available (for all series that worked before anyway)

Sign out and then sign in again.

Thanks… I've already tried on different devices, but it didn't work