The database server could be connected to (which means your username and password is okay) but the c4dmy_1898_db1
database could not be selected.
c4dmy_1898_u1
have permission to use the c4dmy_1898_db1
database?username_c4dmy_1898_db1
. Could that be the problem?If you do not know how to set up a database you should contact your host. If all else fails you may find help at the WordPress support forums.