Error (Index.php)!!

 PGM Class Error! (constructor) 
DBObjPgmSession::__construct  DB-error: Exception: DB_OBJECT->__construct  DB-error: DB_OBJECT::countTables  DB-error: 
MYSQL:sql exception: 
mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc:62
Stack trace:
#0 /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc(62): mysqli->__construct()
#1 /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc(93): MYSQL::connect()
#2 /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc(389): MYSQL::sql()
#3 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(225): MYSQL::getCell()
#4 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(97): DB_OBJECT->countTables()
#5 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(42): DB_OBJECT->constructDB()
#6 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DBObjPgmSession.inc(57): DB_OBJECT->__construct()
#7 /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc(51): DBObjPgmSession->__construct()
#8 /home/erik/Developement/php/obcheckt/public/index.php(32): Core->__construct()
#9 {main}
SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = 'b1300' AND table_name = 'pgmSession';
---- in /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc:157
Stack trace:
#0 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(42): DB_OBJECT->constructDB()
#1 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DBObjPgmSession.inc(57): DB_OBJECT->__construct()
#2 /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc(51): DBObjPgmSession->__construct()
#3 /home/erik/Developement/php/obcheckt/public/index.php(32): Core->__construct()
#4 {main}

#0 /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc(51): DBObjPgmSession->__construct()
#1 /home/erik/Developement/php/obcheckt/public/index.php(32): Core->__construct()
#2 {main}


Fatal error:  Uncaught Exception: PGM Class Error! (constructor) 
DBObjPgmSession::__construct  DB-error: Exception: DB_OBJECT->__construct  DB-error: DB_OBJECT::countTables  DB-error: 
MYSQL:sql exception: 
mysqli_sql_exception: php_network_getaddresses: getaddrinfo for db failed: Temporary failure in name resolution in /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc:62
Stack trace:
#0 /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc(62): mysqli->__construct()
#1 /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc(93): MYSQL::connect()
#2 /home/erik/Developement/php/obcheckt/src/main/php/core/db/MYSQL.inc(389): MYSQL::sql()
#3 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(225): MYSQL::getCell()
#4 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(97): DB_OBJECT->countTables()
#5 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(42): DB_OBJECT->constructDB()
#6 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DBObjPgmSession.inc(57): DB_OBJECT->__construct()
#7 /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc(51): DBObjPgmSession->__construct()
#8 /home/erik/Developement/php/obcheckt/public/index.php(32): Core->__construct()
#9 {main}
SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = 'b1300' AND table_name = 'pgmSession';
---- in /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc:157
Stack trace:
#0 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DB_OBJECT.inc(42): DB_OBJECT->constructDB()
#1 /home/erik/Developement/php/obcheckt/src/main/php/core/db/DBObjPgmSession.inc(57): DB_OBJECT->__construct()
#2 /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc(51): DBObjPgmSession->__construct()
#3 /home/erik/Developement/php/obcheckt/public/index.php(32): Core->__construct()
#4 {main}

#0 /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc(51): DBObjPgmSession->__construct()
#1 /home/erik/Developement/php/obcheckt/public/index.php(32): Core->__construct()
#2 {main} in /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc:68
Stack trace:
#0 /home/erik/Developement/php/obcheckt/public/index.php(32): Core->__construct()
#1 {main}
  thrown in /home/erik/Developement/php/obcheckt/src/main/php/core/Core.inc on line 68