AUTHORIZE GOOGLE DRIVE
Click on Google Drive in the left sidebar navigation. If you see an AUTHORIZE button near the bottom of the window, click it. Select your district Google account and Allow the Google Drive LTI by Canvas to view and manage files. Hopefully, that process will get things working.
GETTING AN AUTHORIZATION TO "STICK"
If you briefly see a momentary notice your account was authorized but then it fails and returns to the screen with the AUTHORIZE button, you probably have disabled third-party cookies in your web browser.
On a Chromebook, start by clicking the icon at the bottom left of the screen to bring up the control panel. Click the Gear icon ⚙ for settings and proceed to step 1 below.
In the Google Chrome browser on other devices, click the ⋮ or ! icon at the top right of the browser window to open the browser menu. Select Settings and proceed to step 1 below.
Once you are in the Chrome browser settings:
Option 1) Allow selected 3rd party Cookies.
Scroll to the bottom of the settings screen and click Advanced.
Scroll down to the Privacy and security section and click on Content Settings.
Click on Cookies.
Make sure the top option is on so that it reads Allow sites to save and read cookie data (recommended).
Make sure that Block third-party cookies is enabled.
Click on Add in the Allow section at bottom
type in [*.]google.com
type in [*.]instructure.com
Click the X at the top right of the settings window to close it.
Option 2) Allow ALL 3rd party Cookies
Scroll to the bottom of the settings screen and click Advanced.
Scroll down to the Privacy and security section and click on Content Settings.
Click on Cookies.
Make sure the top option is on so that it reads Allow sites to save and read cookie data (recommended).
Make sure that Block third-party cookies is NOT enabled.
Click the X at the top right of the settings window to close it.
If that still doesn't help, it could be an extension that has been added to Chrome that is creating an issue:
Open the Chrome web browser.
At the top right, click ⋮ or ! and then Settings.
At the bottom, click Advanced.
Under Reset Settings, click Reset Settings and then Reset or Reset Settings.