3d party interference – It’s been confirmed that several applications are known to conflict with the PWA protocol and cause these repeat errors.To prevent this issue, go ahead and disable the Proxy or VPN connection and see if new instances of the ‘PWA Identity Proxy Host’ error stops occurring. Proxy and VPN interference – Keep in mind that if you’re using a proxy or VPN service, there’s a likely possibility that it ends up conflicting with the PWA protocol.To prevent this issue from occurring, you can fix the issue by re-configuring the behavior of Edge to disallow Edge Extensions from running in the background once the main browser is closed. Edge extensions are running in the background – According to affected users, you can expect to deal with this problem due to a series of Chrome-specific extensions that are permitted to run in the background long after the browser is closed.In this case, you can fix the problem by installing every pending update until you bring your Windows version up to date. Outdated Windows build – Another reason why you can expect to deal with these recurring ‘PWA Identity Proxy Host’ errors is a scenario in which you’re missing a critical feature update that Microsoft released to tackle the various issues surrounding PWAs.

Several affected users have confirmed that they managed to fix the problem simply by installing the pending Chromium Edge update and restarting the browser.

Outdated Microsoft Edge – As it turns out, you face this issue due to a missing infrastructure update that Microsoft has released for the Chromium Edge version.

Several affected users have confirmed that they managed to fix the problem by accessing the Flags menu inside Microsoft Edge Chromium and disabling the Web Apps Identity Proxy.

Web Apps Identity Proxy is enabled – According to several affected users you can hope to experience this problem because the identity proxy for web apps is enabled.

Current microsoft edge version