Upgrade error Access denied

Hello, please need help on upgrade from the latest version of OJS 2 to version 3
When start to upgrade get a message

DB Error: Access denied for user ‘’@‘localhost’ (using password: NO)

Solved add database credentials, but, now have blank page, @bozana maybe you have any idea?
In error have
Warning: Declaration of InstallHandler::validate($request) should be compatible with PKPHandler::validate($requiredContexts = NULL, $request = NULL) in /home//.net/lib/pkp/pages/install/InstallHandler.inc.php on line 118

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; dbObject has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb-xmlschema.inc.php on line 106

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; dbTable has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb-xmlschema.inc.php on line 205

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; dbIndex has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb-xmlschema.inc.php on line 613

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; dbData has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb-xmlschema.inc.php on line 774

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; dbQuerySet has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb-xmlschema.inc.php on line 959

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; adoSchema has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb-xmlschema.inc.php on line 1217

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADODB_Cache_File has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb.inc.php on line 263

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADOConnection has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb.inc.php on line 359

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb.inc.php on line 2921

Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; ADORecordSet_array has a deprecated constructor in /home//.net/lib/pkp/lib/adodb/adodb.inc.php on line 3939

Deprecated: Non-static method PKPRequest::isPost() should not be called statically in /home//.net/lib/pkp/classes/form/validation/FormValidatorPost.inc.php on line 38

Deprecated: Non-static method PKPRequest::_checkThis() should not be called statically in /home//.net/lib/pkp/classes/core/PKPRequest.inc.php on line 396

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /home//.net/lib/pkp/lib/adodb/drivers/adodb-mysql.inc.php:456 Stack trace: #0 /home//.net/lib/pkp/lib/adodb/adodb.inc.php(558): ADODB_mysql->_connect(’’, ‘_ojs’, ‘plinije12’, '_ojs’) #1 /home//.net/lib/pkp/classes/db/DBConnection.inc.php(151): ADOConnection->Connect(NULL, ‘_ojs’, ‘plinije12’, '_ojs’, false) #2 /home//.net/lib/pkp/classes/db/DBConnection.inc.php(126): DBConnection->connect() #3 /home//.net/lib/pkp/classes/db/DBConnection.inc.php(83): DBConnection->initConn() #4 /home//.net/lib/pkp/classes/db/DBConnection.inc.php(52): DBConnection->initDefaultDBConnection() #5 /home//.net/lib/pkp/classes/db/DBConnection.inc.php(227): DBConnection->__construct() #6 /home//.net/lib/pkp/classes/db/DBConnection.inc.php(238): DBConnection::getInstance() #7 /home//.net/lib/pkp/classes/db/DAO.inc.php(73): DBConnect in /home//.net/lib/pkp/lib/adodb/drivers/adodb-mysql.inc.php on line 456