same errors here. prime video. subbed to discoveryplus prime channel. went to hgtv, which is part od discoveryplus. searched for love it or list it. first i have a selection that says you need to buy that series. but after clicking a couple of times through related content, i stumbled upon love it or list it that says its part of my discoveryplus subscription, thus free to play. i select (any of the 17 available) season(s) and get that same message. log says broken JSON, something something. BUT. even though episode listing is broken, every available episode is named after the first episode of the season, there is no numbering for the episodes, audio language selection is missing (video resolution selection is available and working, same goes for audio bitrate selection and subtitles) in the download window and every downloaded episode is named after the first one of the selected season, it downloads just fine and plays back just fine. and every episode is a different episode actually. i just have to rename every downloaded episode before downloading next one, otherwise it gets overwritten since they all have the same name lol. heres what log says...
01:21:16.843 - [Debug] [WCAProxy] Errors in JSON object
01:21:17.044 - [Debug] [WCAProxy] Errors in JSON object
01:21:17.236 - [Debug] [WCAProxy] Errors in JSON object
01:21:17.452 - [Debug] [WCAProxy] Errors in JSON object
01:21:17.627 - [Debug] [WCAProxy] Errors in JSON object
01:21:17.856 - [Debug] [WCAProxy] Errors in JSON object
01:21:18.043 - [Debug] [WCAProxy] Errors in JSON object
01:21:18.238 - [Debug] [WCAProxy] Errors in JSON object
01:21:18.472 - [Debug] [WCAProxy] Errors in JSON object
01:21:18.733 - [Debug] [WCAProxy] Errors in JSON object
01:21:18.919 - [Debug] [WCAProxy] Errors in JSON object
01:21:19.134 - [Debug] [WCAProxy] Errors in JSON object
full log, after downloading one or two episodes of the said show and beforementioned error being displayed, is attached. so, in a nutshell, doesnt seem its related to user required purchasing content, since this is available for me as a part of discoveruplus prime channel subscription. btw, this is the only show that displays this error, thus far.
oh and btw, region is us and im in us. so no vpn etc etc.