What Causes the Mysterious net::ERR_HTTP2_PROTOCOL_ERROR 200 and How Can It Be Resolved?

ERR_HTTP2_PROTOCOL_ERROR: An Enigma Unraveled

Problem Statement

The net::ERR_HTTP2_PROTOCOL_ERROR 200 error has emerged as a mysterious issue plaguing websites accessed via HTTPS on Google Chrome. Despite its rarity, numerous reports indicate its occurrence across different web browsers and operating systems.

Possible Triggers

While the exact cause of this error remains elusive, several observations suggest potential triggers:

• Accessing the website via HTTPS
• The presence of a 200 header in the HTTP response
• The involvement of external components (e.g., Twitter feed integration)
• Internet connectivity issues

Troubleshooting and Investigation

Numerous investigations have been conducted to unravel the mystery behind this error:

• Comparing HTTP headers for pages with and without the error reveals subtle differences, pointing towards the 2XX response code as a possible culprit.
• Analyzing curl --head requests shows a successful connection, eliminating network issues as a potential cause.
• Examining chrome://net-tools and exploring network logs reveals an RST_STREAM event on the client side, indicating an abrupt termination of the request.

Conclusion

While no definitive solution has been identified, one user's experience suggests that disk space depletion on the web server may be a contributing factor. This finding warrants further investigation and serves as a reminder of the intricate interplay between web development and server infrastructure.

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