Today i installed Cubase 10.0.20 maintenance update.
After opening it, immediately all kinds of E-licenser errors and eventually i had to shut down Cubase cause the errors made Cubase hang.
De-installed E-licenser software (with the de-installer that comes with it).
Downloaded newest E-licenser version from Steinberg site and installed that.
I then executed the maintenance option in E-licenser software.
Just for the sake, i logged my macbook out and then in.
I openend Cubase 10.0.20 again.
This time: no more E-licenser errors and Cubase started up succesfully.