Hi there,
I got the same error, but when I go to the Version Manager tab, anything I tried to install from there will give me ERROR 404.
https://i.gyazo.com/04864fdfa120b2637362...88638d.png
https://i.gyazo.com/7a3835d215fc910bc567...dc1749.png
https://i.gyazo.com/682fcb1d31b9ee24b9c2...b6db3b.png
I got the same error, but when I go to the Version Manager tab, anything I tried to install from there will give me ERROR 404.
https://i.gyazo.com/04864fdfa120b2637362...88638d.png
https://i.gyazo.com/7a3835d215fc910bc567...dc1749.png
https://i.gyazo.com/682fcb1d31b9ee24b9c2...b6db3b.png