MacOS: Importer 'WavImporter' had unexpected failure

Hello!

I am new to MonoGame and have the problem that when I try to import audio files, my program does not compile (Importer ‘WavImporter’ had unexpected failure).
I work on MacOS with the Rider IDE.
I have already read this and this article. My project files are readable from outside and the supplied ffmpeg and ffprobe files are executable, but the error still remains.

Thanks in advance for your help.

Here is the full error message:

fp-10-126-130-113:content jaschahettich$ /Library/Frameworks/Mono.framework/Versions/Current/bin/mono /Users/jaschahettich/.nuget/packages/monogame.content.builder/3.7.0.4/build/MGCB/build/MGCB.exe /@:/Users/jaschahettich/RiderProjects/MonoGameDesktopGLGame/MonoGameDesktopGLGame/Content/Content.mgcb /platform:DesktopGL /outputDir:bin/DesktopGL/Content /intermediateDir:obj/DesktopGL/Content
Build started 10/29/2019 6:05:35 PM

/Users/jaschahettich/RiderProjects/MonoGameDesktopGLGame/MonoGameDesktopGLGame/Content/Audio/Logo_hit.wav
/Users/jaschahettich/RiderProjects/MonoGameDesktopGLGame/MonoGameDesktopGLGame/Content/Audio/Logo_hit.wav: error: Importer 'WavImporter' had unexpected failure!
Microsoft.Xna.Framework.Content.Pipeline.InvalidContentException: Failed to open file Logo_hit. Ensure the file is a valid audio file and is not DRM protected. ---> System.InvalidOperationException: ffprobe exited with non-zero exit code.
  at Microsoft.Xna.Framework.Content.Pipeline.Audio.DefaultAudioProfile.ProbeFormat (System.String sourceFile, Microsoft.Xna.Framework.Content.Pipeline.Audio.AudioFileType& audioFileType, Microsoft.Xna.Framework.Content.Pipeline.Audio.AudioFormat& audioFormat, System.TimeSpan& duration, System.Int32& loopStart, System.Int32& loopLength) [0x0001c] in <21694ce2bd7a4add8c34ca22998e7694>:0 
  at Microsoft.Xna.Framework.Content.Pipeline.Audio.AudioContent..ctor (System.String audioFileName, Microsoft.Xna.Framework.Content.Pipeline.Audio.AudioFileType audioFileType) [0x00015] in <21694ce2bd7a4add8c34ca22998e7694>:0 
   --- End of inner exception stack trace ---
  at Microsoft.Xna.Framework.Content.Pipeline.Audio.AudioContent..ctor (System.String audioFileName, Microsoft.Xna.Framework.Content.Pipeline.Audio.AudioFileType audioFileType) [0x0023b] in <21694ce2bd7a4add8c34ca22998e7694>:0 
  at Microsoft.Xna.Framework.Content.Pipeline.WavImporter.Import (System.String filename, Microsoft.Xna.Framework.Content.Pipeline.ContentImporterContext context) [0x0003f] in <21694ce2bd7a4add8c34ca22998e7694>:0 
  at Microsoft.Xna.Framework.Content.Pipeline.ContentImporter`1[T].Microsoft.Xna.Framework.Content.Pipeline.IContentImporter.Import (System.String filename, Microsoft.Xna.Framework.Content.Pipeline.ContentImporterContext context) [0x0001c] in <21694ce2bd7a4add8c34ca22998e7694>:0 
  at MonoGame.Framework.Content.Pipeline.Builder.PipelineManager.ProcessContent (MonoGame.Framework.Content.Pipeline.Builder.PipelineBuildEvent pipelineEvent) [0x00079] in <21694ce2bd7a4add8c34ca22998e7694>:0