MS Access connecting to MySQL

This code has worked perfectly fine for me:

DoCmd.RunSQL "INSERT INTO InschrijversLokaal (id, SubmissionId, ide, idu, inschrijfnaam, email, veldinhoud) SELECT Inschrijvers.id, Inschrijvers.SubmissionId, Inschrijvers.ide, Inschrijvers.idu, Inschrijvers.name, Inschrijvers.email, Inschrijvers.FieldValue FROM Inschrijvers IN '' [ODBC;Driver=MySQL ODBC 5.1 Driver;Server=server.srvr.nl;Database=database;UID=user;PWD=password;FOUND_ROWS=1;BIG_PACKETS=1]"

The moment one Joomla program was updated and proberly changed something in the tables, I received the next error.

Fout 3146 tijdens uitvoering:
ODBC: de oproep is mislukt.
[MySQL][ODBC 5.1 Driver][mysql-5.5.50-cll-lve]Source character set not supported by client (#0)

And Ms Access crashes when I add '';CHARSET=utf8mb4" to the connectionstring:

... IN '' [ODBC;Driver=MySQL ODBC 5.1 Driver;Server=server.srvr.nl;Database=database;CHARSET=utf8mb4;UID=user;PWD=password;FOUND_ROWS=1;BIG_PACKETS=1]"

What do I do wrong?

Thanks in advance, kind regards,

Ernst