In Requestly app menu bar, navigate to Proxy > Remove Proxy.
Now check if it works or not. If it still doesn't works, then try the steps below.
Open System Preferences for you system.
Navigate to Network > Advanced > Proxies.
Uncheck Web Proxy (HTTP) and Secure Web Proxy (HTTPS)
Press Ok and Apply.
If your browser shows issue related to certificates, then
In menu bar, navigate to Certificate > Install Certificate.
This will prompt you for your password (sudo access is required)
Click OK. Now you app should be working fine.
Open Devtools of the browser.
Navigate to Network tab.
Check on Disable cache checkbox and refresh the page without closing the devtools window.