I had the same problem until I used Microsoft Edge with no extensions enabled and all the default settings used. A browser window should open up (separate from TurboTax) and a login screen appears. Once you login (in the browser window) Fidelity will transfer the information. Then it will say you can close the browser window and return to TurboTax. Now back in TurboTax you can see what was imported and click the button that says "import."
I have no idea why my Chrome browser did not work.
