Can you check again with the most recent build and source code? I fixed a few things regarding sample detection last week.

Can you upload the project folder somewhere? There must have gone something wrong with the file locations.

My samplemap's name is "solo campana" how I Call this samplemap

{
Sampler.loadSampleMap(solo campana);
}

See Chris's post... https://forum.hise.audio/topic/1444/vst-export-failed/4
Projucer settings:
Path to JUCE
to..your..Hise...SDK..Folder/JUCE
JUCE modules
to..your..Hise...SDK..Folder/JUCE/modules
VST (Legacy) SDK
to..your..Hise...SDK..Folder/tools/SDK/VST3 SDK
VSVT3 SDK
to..your..Hise...SDK..Folder/JUCE/modules/juce_audio_processors/format_types_/VST3SDK

Using scriptnode branch.