gpg: invalid key resource URL following Docker official guide
Solution 1:
I recently had the same issue and fixed it by doing
sudo rm "/etc/apt/trusted.gpg.d/home:manuelschneid3r.gpg"
Or
sudo rm "/etc/apt/trusted.gpg.d/home:manuelschneid3r.asc"
This could be due to installing the Albert launcher, here is a related issue. Thanks to Sasgorilla in the comments
Solution 2:
Got this error while installing MongoDB. Following worked for me.
sudo rm /etc/apt/trusted.gpg.d/home:manuelschneid3r.gpg