I was on SF 7.0.1.8 and was getting ErrorCode 10203 when downloading three specific episodes from D+ (US, no VPN). After updating to SF 7.0.1.16 still experiencing the same error.
Hawkeye s01e01
Inhumans s01e06
Inhumans s01e07

I searched the forum for this error but did not find it.
I submitted feedback to SF so they should have the logs
I’m posting this because if they provide a solution then it can be documented and found by future passers-by.
Errors in the log file show error 203, which is “The request was successful, but the enclosed payload has been modified”.
I attached the SF log file.