Allowing Cookies in Firefox
(tested in Firefox 62.0.2)
In Firefox, open your browser settings.
Option 1: Allow all cookies

Tip: You can search for "cookies" on the top right to bring up the setting.
Select "Allow cookies and site data from websites (recommended)"
Option 2: Add "app.peergrade.io" to your exceptions list


Allow cookies in Chrome
(Tested in Chrome 69.0.3497.100)
Open Settings
Search and find "Content settings"

3. From inside "Content Settings", Go to "Cookies"

Option 1: Unblock third party cookies

Option 2: Allow "[*.].app.peergrade.io"


Other troubleshooting
It could be helpful to restart the browser after verifying Third Party Cookies are allowed from https://app.peergrade.io.