Your log shows that Big Brother was not 480p but failed entirely with a 603 error - Access Denied. Prior to that there were numerous listings of this type:
2023:12:15-16:02:40 0x000037c4 [Critical]: "[WVItv]" m_pVideoInfo->mType is None!
2023:12:15-16:02:40 0x00002858 [Critical]: **** Get key fail. The error is : 304
2023:12:15-16:02:40 0x00002858 [Info]: Get MPD retry count : 2
2023:12:15-16:02:41 0x00002858 [Info]: Get mpd data success .
2023:12:15-16:02:41 0x00002858 [Info]: periodBaseUrl dash/
2023:12:15-16:02:41 0x00002858 [Info]: Period attribute id : 1
2023:12:15-16:02:41 0x00002858 [Info]: ParseMPD, cast 52 ms
2023:12:15-16:02:41 0x00002858 [Info]: Match audio/subtitle success .
2023:12:15-16:02:42 0x00002858 [Critical]: Get pssh error!
2023:12:15-16:02:42 0x00002858 [Critical]: Get pssh error!
2023:12:15-16:02:42 0x00002858 [Critical]: Get pssh error!
2023:12:15-16:02:42 0x00002858 [Critical]: Get pssh error!
2023:12:15-16:02:42 0x00002858 [Critical]: Get pssh error!
In short, it appears that you are having some encryption problems perhaps caused by your VPN. Since your first show, Celebrity, worked, I'd clean your cookies, history, other data, and delete your temp folder contents and try again just with BB. Let me know how it goes and if it fails please post the new log file.
Recently, either on this forum or the competitor's, a person had a similar problem that was fixed by, I believe, turning off the encryption on their VPN. I'm going to try to track that done and perhaps we could try something different. No promises.
Questions: You were trying to download BB S01E36 Live Final, correct? Do you have a ITVX Premium account?â