Hello!
Make sure that /bin/bash is used as default shell for root. Set /bin/bash to default shell for root and try to start migration again or run the command ssh
[email protected] "LANG=en_US.utf-8 /bin/grep -m1 -E '^\s*PRODUCT_ROOT_D' /etc/psa/psa.conf".
And if this does not help you, could...