Your ROOT_URL in app.ini is https://git.cloudchain.link/ but you are visiting https://dash.bss.nz/open-source-mirrors/Readarr/commit/302949048b9a73aa8a3dd3ec25215ee78d58b21a
You should set ROOT_URL correctly, otherwise the web may not work correctly.
add .nzb to file when downloading, need to change to WebRequest/WebResponse to get the file so we can retrieve the actual file name... Use %NZBDRONE_PATH% to store NZB if path is not provided...