Physitrack isn't loading in DrChrono

Note: the iframe integration works in all modern browsers, except Safari

DrChrono loads Physitrack within a so-called iframe.

Some browsers, including Google Chrome 80, block this iframe in rare cases. As a result, you can get the message:

physitrack.com has refused the connection (or a similar message)

To fix the problem (Google Chrome):

Open Google Chrome
Copy the chrome://flags/#same-site-by-default-cookies and paste it in the address bar
Press enter
Go to "SameSite by default cookies" and set the value to "Disabled":
Scroll down a little to "Cookies without SameSite must be secure" and also set this value to "Disabled"
Press the Relaunch button on the bottom right of your window.