HTTP Error 403: Forbidden (caused by HTTPError());

[45145v]

C:\Users\91799\Downloads\youtube-dl>youtube-dl --write-sub --write-auto-sub --all-subs https://www.viki.com/videos/1178335v
[viki] 1178335v: Downloading video JSON
[viki] 1178335v: Downloading MPD manifest
WARNING: [viki] Unknown MIME type image/jpeg in DASH manifest
[viki] 1178335v: Downloading video streams JSON
ERROR: Unable to download JSON metadata: HTTP Error 403: Forbidden (caused by HTTPError()); please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type youtube-dl -U to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[45145v]

it's not working and i have seen others issues but idont understand

how to use now as this error is occuring

for this epi and max

but for flower boy raeman soup this error not comming

so may be fault with something else

also tell me how to merge subtitles and video insteadof downloading like a file