I had a windows10 and Manjaro on my laptop and everything was Ok. last day I've installed Kali Linux in another partition. It has installed correctly and it works fine. But the problem is when I want to boot my Manjaro. I select Manjaro on the grub menu but this is the screen I see.
And this is the Error:
not syncing vfs unable to mount root fs on unknown-block(0 0)
How can I fix the problem?