Resource not found

GET /lifecycle/flows/signup?continue=https://uc.appengine.google.com/_ah/conflogin?state%3D~AJKiYcF9MJ66fAS25SgwOylwtBm_DBBYPCnOkswQQI_AKc0baejXZlzivcgrEpWzWkuFUJIdV4pmWW9j2rA-TuTHekUWbQN2RD2vbkgXX2U9xOHWqQ1TPbd8ON9rS5YrkwzWIDjwrBXEANz1OrI4iuMuKusflzDceRGBloK9I5aZfYjeLkloFKbz27fUjFH83see0isruh37XISowyrlyLgdduhDd51J1feYBNuuGKT4bFlkgQ0l4d8&dsh=S336234721:1714649769865909&flowEntry=SignUp&flowName=GlifWebSignIn&ifkv=AaSxoQx9ZKEUp2XlhelbqHW1Plan8jtMiBZ89vfIwQ622lA8Z9h5NaSMGxueYW-cv4QT1iPb18GqQw HTTP/1.1
Accept: */*
Content-Type: ; charset="utf-8"
Host: openradar.appspot.com
Traceparent: 00-4cbe15b1b4120a6e6d4a987d981f1fd9-5417bea951a3eb3e-00
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
X-Appengine-City: columbus
X-Appengine-Citylatlong: 39.961176,-82.998794
X-Appengine-Country: US
X-Appengine-Region: oh
X-Cloud-Trace-Context: 4cbe15b1b4120a6e6d4a987d981f1fd9/6059521458078739262