The "Smart Compose" preference in Google Docs can interfere /disrupt the Co:Writer Chrome Extension.
Co:Writer prediction is frozen.
All the text you type is in capital letters.
This can be resolved by turning off the "Smart Compose" preference in Google Docs.
Steps to turn off "Smart Compose":
Open a Google Doc.
Click on the Tools Drop down menu.
Uncheck "Show Smart Compose suggestions".
Click on OK.
Refresh the page.