You are receiving "Invalid QR Code" error after scanning the QR code while enrolling an Android device.
"Invalid QR code" usually happens due to the following reasons:
Request a new invitation from your administrator to obtain a valid QR code for MDM enrollment.
If the problem still persists, contact mdm-support@manageengine.com (MDM On-Premises) or mdmcloud-support@manageengine.com (MDM Cloud)