[版本 4.x] 遇到问题,连接数据库DBDriver设置为ODBC时,访问出错

'DSN' => 'DRIVER={DM8 ODBC DRIVER};Server=localhost:5236;Database=MAIN',
'hostname' => 'localhost',
'username' => 'SYSDBA',
'password' => 'SYSDBA',
'database' => 'MAIN',
'DBDriver' => 'ODBC',
'DBPrefix' => '',
'pConnect' => true,
'DBDebug' => true,
'cacheOn' => FALSE,
'charset' => 'utf8',
'DBCollat' => 'utf8_general_ci',
'swapPre' => '',
'encrypt' => false,
'compress' => false,
'strictOn' => false,
'failover' => [],
'port' => 5236

链接设置我这样设置的,最后报错
Class "CodeIgniter\Database\ODBC\Connection" not found
不用框架是能访问的。