Background
The repo github.com/Unknwon/com already renamed to github.com/unknwon/com in the version v1.0.0.
https://github.com/unknwon/com/blob/v1.0.0/example_test.go
package com_test
import (
"github.com/unknwon/com"
…
)
The github.com/Unknwon/com is the old path, any repos using it should be updated to import and require github.com/unknwon/com. Or this may take some potential problems.
Solution
Replace all the import paths, change "github.com/Unknwon/com" to "github.com/unknwon/com".
Where did you import it: https://github.com/rai-project/rai/search?q=github.com%2FUnknwon%2Fcom&unscoped_q=github.com%2FUnknwon%2Fcom