(Assuming you're using Windows 10) here's how to fix:
1. Go to File Explorer
2. Click up where it says," Quick access."
3. Type in there %LOCALAPPDATA%\GOOGLE\CHROME\USER DATA
4. Press enter
5. Find a folder named "Default"
6. Right click on it and press rename
7. Rename the folder to Backup Default
8. Open Google Chrome again.
The problem should be solved