Xcode构建失败的“致命错误:畸形或损坏的AST文件”Crashlytics.h。

I recently enabled modules in my Xcode project build settings ("Enable Modules (C and Objective-C)") and now I frequently get the below build error. It works the next time I build (without any changes) but it is annoying because it happens very often (several times an hour).I recently enabled modules in my Xcode project