Top 700 technical problems

CORS preflight fails when request includes credentials

HTTPS site loads but API call is blocked as mixed content

SSL certificate works in browser but API client rejects it

Browser redirects HTTP to HTTPS repeatedly

API returns 413 when uploading a normal file

Reverse proxy strips required authorization header

HTTP request succeeds but browser reports CORS failure

TLS certificate renewal completes but old certificate remains active

WebSocket connects locally but fails behind HTTPS proxy

Browser caches an old redirect after server configuration changed