Grafana add-on, plugin installation not working, "plugin" textbox just gets emptied

Hi,

I’m trying to install the Grafana plugin “Sun and moon”. When typing anything into the “plugins” textbox in the Grafana add-on configuration textbox, that textbox gets automatically “emptied out” right after I leave it. So I can’t type in the plugin ( - fetzerch-sunandmoon-datasource) or anything else for that matter.

I tried both Chrome and Edge, I stopped the add-on while trying… nothing seems to help. What’s wrong here?