Exception: Incorrect Content-Type: must be textual to extract_string, JSON to extract_json.

[Kyguyog]

kyguy@Kyguy-CB:~/Downloads$ ./AltServer-x86_64 -u 'my uuid' -a thaynekyan14@gmail.com -p "my password" Sidestore.ipa
Installing app...
Received response status code: 200
parse anisette data ret
Alert: Could not install Sidestore.ipa to unknown.
Incorrect Content-Type: must be textual to extract_string, JSON to extract_json.
Press any key to continue...

Exception: Incorrect Content-Type: must be textual to extract_string, JSON to extract_json.
0# 0x00000000005CF298
1# 0x000000000099EC2C

Finished!
kyguy@Kyguy-CB:~/Downloads$

i saw one like this but with a different status code so i put it here