Pyinstaller Errormessage: Cannot find existing PyQt5 plugin directories

[PythonQTMarlem]

Hello,

Windows 10. Qt version 5.9.7 in C:/ProgramData/Anaconda3/Library/lib

ich möchte mit pyinstaller aus einer Python Qt Anwendung eine exe-Datei verwalten.

I want to manage an exe file from a Python Qt application with pyinstaller.

I get this error message:
Existing PyQt5 plugin directories cannot be found
Checked paths: C: / qt64 / qt_1544645195969 / _h_env / Library / plugins

What can I do about it?