Failed to fetch API

[morozkoo]

While requesting

https://iis.bsuir.by/api/v1/schedule?studentGroup=320603

Received following error

DecodingError.dataCorrupted: Data was corrupted. Debug description: The given data was not valid JSON.. Underlying error: Error Domain=NSCocoaErrorDomain Code=3840 "Unexpected character 'Ð' around line 1, column 1." UserInfo={NSDebugDescription=Unexpected character 'Ð' around line 1, column 1., NSJSONSerializationErrorIndex=0}

Context

Version: 3.5.2(130)