How can I fix deprecated APIs warning on my website?

[dongfuCamera]

Hi,i can't find place to fix the warning ,can any one help ,thank you 

Synchronous `XMLHttpRequest` on the main thread is deprecated because of its detrimental effects to the end user's experience. (dongfutrade.com)

[RococoDigital · Accepted solution]

The pushdaddy livechat would be my guess.

[RococoDigital · Accepted solution]

The pushdaddy livechat would be my guess.

[dongfuCamera · Accepted solution]

Yes,You are right, I delete the livechat，It solved the problem,thanks