I’ve finally discovered the problem: The script fails in executing this command and creates this problem. Just copy paste this command and execute it in terminal:
echo “artifact_name=umbrelOS” > /etc/mender/artifact_info
then try to update. 
I’ve finally discovered the problem: The script fails in executing this command and creates this problem. Just copy paste this command and execute it in terminal:
echo “artifact_name=umbrelOS” > /etc/mender/artifact_info
then try to update.