problem with libspatialindex using tkinter

[Timych]

I am trying to generate .exe with the help of pyinstaller. However, when I try to run my executable file it generates an error :

in exec_module
      exec(bytecode,module.__dict__)
File "rtree\core.py",line 126, in <module>
OSError: could not find or load spatialindex_c-64.dll
[16436] Failed to execute script main

I have seen few questions related to this problem but nothing helps. I tried to uninstall rtree and download a .whl file but after installation error was similiar but spatialindex_c-64.dll was substituted with spatialindex_c.dll


Thank for response!