Update kernel modules after Spyder update

I updated my Spyder today to Spyder 5.1, and now it keeps showing me this error message:

Your Python environment or installation doesn't have the spyder‑kernels module or the right version of it installed (>= 2.1.0 and < 2.2.0). Without this module is not possible for Spyder to create a console for you.You can install it by running in a system terminal:conda install spyder‑kernels=2.1orpip install spyder‑kernels==2.1.*

I already tried both commands, the pip one works but I still get the error message, the conda command does not even work and shows me

The following packages are not available from current channels

Normally I use conda for all packages that are availabel on conda, so maybe someone faced the same issue?