2017模块化和预制建造:Failed to connect to driver 2是什么意思?

failed to connect driver 2 Failed to connect to driver 2是什么意思? failed to connect to host 什么意思 failed to connect to proxy localhost failed to connect to proxy localhost failed to connect world server 意思？ Connect(0) to MySQL (localhost,VLSA099) failed Connect(0) to MySQL (localhost,qhzw_f) failed failed to connect to drivrr2对话框是什么意思啊？ Failed to connect to driver 2是什么意思？怎么解决？