LogPackageName: Error: DoesPackageExist: DoesPackageExist FAILED

I’m trying to PackAge my project and it fails because of that error:

LogPackageName: Error: DoesPackageExist: DoesPackageExist FAILED: ‘/ImpostorBaker/ImpostorBaker/MaterialFunctions/FrameBlendWeights’ is not a standard unreal filename or a long path name. Reason: La ruta no comienza con una raíz válida. La ruta debe comenzar por: ‘/Engine/’, ‘/Game/’, ‘/PoliigonToolbox/’, ‘/Paper2D/’, ‘/OpenColorIO/’, ‘/AnimationSharing/’, …

I’ve seen in other forums and I think that i’ts because there’s a file that begin with “(”

Can someone help me? I’s very urgent