Dear @skocev,
seeing things like
would make me think something is wrong with your setup. I would suggest starting over from scratch and check whether these errors happen again. Maybe Windows messed up your plugins folder in any way beyond imagination.
Are you already aware of https://localhost:3000/t/how-to-manually-install-the-grafana-clock-plugin/5708? However, because Install plugins | Grafana documentation is referenced by @mefraimsson there, we currently don’t see how that would support installing from a .zip file directly without having to copy the .zip archive content into the plugins folder manually.
@grahamnicholls is also saying
which at the same time happens to be the designated solution for this very topic.
With kind regards,
Andreas.