Thank you , make my today happy.
Finally updated my system to UBUNTU 18.04,
tough it helps.
Nothing changed.
Dig it to charset in mysql database.
I had to allow in mariadb.cnf the # out lines and let set the charset to
[mysqld]
charser-set-server=utf8mb4 (it was utf8)
collation-server=utf8mb4_unicode_ci (it was general_ci)
Now it works!
No more error in list.
Please close this subject.