Thanks – the button works now. 🙂
I hope, the developer will fix the problem. Meanwhile I deactivate the plugin before I use “AddMedia”.
It’s OK. I found out, what’s the problem.
There ist a subfolder named “announceME”. I have renamed the folder plugins/announceme and copied the subfolder to the plugins folder.
Now it works.
Whenn installing, the full folder “announceme” with a subfolder also called announceme ist uploaded. This is the problem.
But there is another problem: When I activate the plugin, the menu of the Dashboard is still there, but the entries (e. g. Tools, Preferences) cannot be expanded.