Automatic footprint assignment (equ file) always ends with the same error.

Description

There was a problem with a automatically assigning a footprint from the equ file. The problem is independent when using Absolute or Relative Path.

Steps to reproduce

The path to the equ file does not appear to be passed correctly. In the window where you can add an equ file with the Absolute / Relative path option, the file can be edited back at any time (button Edit File) - even if I close and reopen the project. If the equ file exists or even delete it, I will get the same dialbox. (In version 5 it works fine)

KiCad Version

Application: KiCad (64-bit)

Version: (6.0.4), release build

Libraries:
	wxWidgets 3.1.5
	libcurl/7.78.0-DEV Schannel zlib/1.2.11

Platform: Windows 10 (build 19044), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Mar 18 2022 03:04:44
	wxWidgets: 3.1.5 (wchar_t,wx containers)
	Boost: 1.76.0
	OCC: 7.6.0
	Curl: 7.78.0-DEV
	ngspice: 36
	Compiler: Visual C++ 1928 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON