Many users have complained about this error and saying that although they are already signed in Google drive on chrome they are stuck with this error message on Chrome while trying to use Google drive.
you are not signed in you are signed out. sign back in, then click retry
Just try out the fix given below to solve this problem
Fix – you are not signed in error in Google Drive on Chrome
1. Go to chrome://extensions/
2. Uninstall Privacy Badger
Voila! You have fixed the error.
Fix – Using Windows defender Firewall
1. Go to Control Panel > System and Security > Windows Defender Firewall
2. Now, in left menu, click on Allow an App or feature through windows defender firewall
3. Click on Change settings.
4. Now, Make sure that Google drive is selected.

Saurav is associated with IT industry and computers for more than a decade and is writing on The Geek Page on topics revolving on windows 10 and softwares.
Liam says
I dont even have a app called privacy badger
DSkapp says
This is not a solution, this is bowing down to the ### at Google and allowing them to mine device data outside of Drive and invade your privacy. The antitrust suit against them can’t come soon enough.