Issue with Fetching Data from GitHub.io via TCP

I'm encountering an issue while trying to fetch data using a Cavli Inc. LTE CAT1.bis Module (Model: C16QS) from a GitHub.io hosted server. Below is the sequence of AT commands I'm using and the response I receive:

// AT+CDNSGIP="airy-039.github.io"// AT+CIPSTART=TCP,airy-039.github.io,443,1// AT+CIPSEND=78// GET /filey/Seria1_Test_Terminal.ino.bin HTTP/1.1\r\n// Host: airy-039.github.io\r\n// Connection: close\r\n// \r\n// AT+CIPCLOSE

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Problem:The module successfully establishes a connection to the server (airy-039.github.io) but encounters a 400 Bad Request error when trying to send a request.

Additional Information:The server is hosted on GitHub.io.The LTE module firmware version is V1.4.5.The hardware version is C16QS_HW_V2.21(2711).I have verified that the server and URL are accessible through other means (e.g., web browser).Any insights or suggestions on how to resolve this issue would be greatly appreciated. Thank you!