经过九个小时的拔毛，诅咒并将头埋在我的手中......我所要做的就是创造一个新项目，手动传输文件，错误就消失了。 Argh。

After nine hours of hair pulling, cursing and burying my head in my hands... All I had to do was create a new project, transfer the files over by hand, and the error went away. Argh.

更新：我将自己的答案标记为正确并不代表其他答案错误 - 我没有机会尝试其中任何一个。

Update: My marking my own answer as correct does not mean these other answers were wrong - I didn't get a chance to try any of them.