Problems inserting data in the database

@Teodor, how can we use a repeat step directly?
I tried to follow this tutorial Using Tagify with Multi References.
My issue comes when I try to use multiple reference in the db as outlined in here Using Multi References in the Database Manager. As no matter what it looks like my host doesn’t allow this action to take place.

The error I get is
Database update failed
Database changes failed due to an error!
Error: ER_HOST_NOT_PRIVILEGED: host ''is not allowed to connect to this mariaDB server.

Note: I am using a MySQLDB not a mariaDB.

Any help would be much appreciated.

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