Sending Notification failed for notify type - error since update to 14105

Sending Notification failed for notify type - error since update to 14105

Hi

Since the update to 14105 getting this error:

Sending notification failed for notifyType : Technician for woID : 205999 Reason : {"response_status":{"status_code":4000,"messages":[{"status_code":4012,"field":"to","type":"failed","message":"Value not provided"}],"status":"failed"}}
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