Kopernio reports it is under maintanance for more than a week
Since about a week Kopernio stopped finding any papers on any sites. If I try to use the search field to enter DOI, it reports "Kopernio is currently undergoing maintenance. Apologies for any inconvenience this may cause."
Computer: Windows 10, Firefox 75, Kopernio plugin 0.12.3, no Privacy Badger installed.
Affiliation: University of Southern Denmark.