Hi all,
Just wanted to let you know the solution for my issue:
I used custom themes. Appearantly themes do a bit more than 'just some
formatting' because with the default 6.0.1 themes, the buttons started
working again.
So, now I recreated my themes, based on the default 6.0.1 themes, and
everything works again now.
I hope posting this here will help someone with a similar issue in the
future. :-)
Thanks for making keycloak as great as it it is! :-)
MJ