Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/Readarr/src/commit/acaa05c9c031f17495f03a3098046c6790378bb5/IISExpress/custerr.dll You should set ROOT_URL correctly, otherwise the web may not work correctly.
Readarr/IISExpress/custerr.dll