No internal server error for me
Bug in games archives

{"archives":["https://api.chess.com/pub/player/yorgunkelebek/games/2014/11","https://api.chess.com/pub/player/yorgunkelebek/games/2014/12","https://api.chess.com/pub/player/yorgunkelebek/games/2015/01","https://api.chess.com/pub/player/yorgunkelebek/games/2015/06","https://api.chess.com/pub/player/yorgunkelebek/games/2015/07","https://api.chess.com/pub/player/yorgunkelebek/games/2017/06","https://api.chess.com/pub/player/yorgunkelebek/games/2017/08","https://api.chess.com/pub/player/yorgunkelebek/games/2018/10","https://api.chess.com/pub/player/yorgunkelebek/games/2019/05","https://api.chess.com/pub/player/yorgunkelebek/games/2019/07","https://api.chess.com/pub/player/yorgunkelebek/games/2019/09","https://api.chess.com/pub/player/yorgunkelebek/games/2019/10","https://api.chess.com/pub/player/yorgunkelebek/games/2020/01"]}

Yesterday, there was a period of about 40 minutes where the database that backs the public API would sometimes error and then cache that response. Typically, if there is an error (about 1 request in 1,000,000 does), the error is ignored and a retry fixes it. I expect that your request was victim to this issue.
Error message returned for this end point:
https://api.chess.com/pub/player/yorgunkelebek/games/archives
{"status":"error","message":"Internal Server Error"}
Member @YorgunKelebek
Web archive for daily:
https://www.chess.com/games/archive/yorgunkelebek