iOS Question Error while compiling

B4i Version: 5.81
Parsing code. (0.02s)
Building folders structure. (0.05s)
Compiling code. (0.03s)
Compiling layouts code. (0.00s)
Building Xcode project (0.50s)
Sending data to remote compiler. Error
Out: note: Using new build system
error: Could not delete `/Users/administrator/Documents/UploadedProjects/<user id>/build` because it was not created by the build system.


Error: ** CLEAN FAILED **

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