Hello @tommy 
var signature = ZoomMtg.generateSignature({
meetingNumber: meetingConfig.mn,
apiKey: API_KEY,
apiSecret: API_SECRET,
role: meetingConfig.role,
success: function (res) {
console.log(res.result);
meetingConfig.signature = res.result;
meetingConfig.apiKey = API_KEY;
var joinUrl = "http://zoom-class.test/meeting.html?" + testTool.serialize(meetingConfig);
console.log(joinUrl);
window.open(joinUrl, "_blank");
},
});
after 24 hours create the signature is expired.
Can you please help me to sort out this issue asap?