iOS Question Hosted builder "Error: ** CLEAN FAILED **" [Solved by itself]

[MitchBu]

I cannot run anymore any project with the hosted builder. I get the below.
Will appreciate any help.

TIA

Edit: This morning the problem has disappeared

B4i Version: 7.50
Parsing code.    (0.15s)
Building folders structure.    (0.16s)
Compiling code.    (0.31s)
Compiling layouts code.    (0.05s)
Compiling debugger engine code.    (1.75s)
Building Xcode project.    (0.29s)
Preparing project for builder.    (0.45s)
    Project size: 1.11 MB
Sending data to remote compiler.    Error
Out: Command line invocation:
    /Applications/Xcode.app/Contents/Developer/usr/bin/xcodebuild clean

note: Using new build system
error: Could not delete `/Users/erel/Documents/UploadedProjects/<user id>/build` because it was not created by the build system.


Error: ** CLEAN FAILED **