Having three installed plugins, I had one since several weeks and now yet another one that is having a red shield icon beside its name:
I tried to inspect the DOM of the icon with the F12 tools but found no clue.
Trying to uninstall such a red-shield-marked plugin results in the error message:
Error uninstalling plugin name
Also I see several JavaScript errors and a 403 error in the F12 console when trying to uninstall such a plugin.
My question
What does the red shield icon mean?