0.9.12运行策略出现错误 “no Qt platform plugin could be initialized”

已成功安装0.9.12，尝试运行经典策略，但出现以下错误
“This application failed to start because no Qt platform plugin could be initialized.  Reinstalling the application may fix this problem.”
再重新安装但仍然无法解决。请问是哪里出问题？