In interfacing the sensor over the vps

i have wriiten the code correctly in the project mailgun , and still i m facing a error , named Expecting value: line1 column 1 (char 0)
i dont know what to do with that , and i checked even the logs in the mailgun dashborad , no mails was sent or recieved

@rakeshozon Could you please share the code that you have written for mailgun project? Seems like there is an issue with your code.

thats the actual code , i have checked the API keys , and device ids all were perfect