Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/Prowlarr/commits/commit/4b4499b4a21f6dba12b1ca5d4c2c9e5b473bdd48/IISExpress/custerr/en-us/404-9.htm
You should set ROOT_URL correctly, otherwise the web may not work correctly.