Datasheet path resolution issue with double slashes

Description

In the Schematic Editor hovering a symbol and pressing "D" key should open the datasheet document corrsponding to the field "Datasheet" of that symbol. If the field contains a hyperlink (web) the page opens and the pdf document is displayed correctly. If the field contains a local path to a pdf file, the following error message is displayed:

The System default PDF viewer option is selected in the Preferences as shown:

Changing this option to "Other:" to point to the binary of the system PDF viewer (Foxit PDF Reader) fixes the issue and the PDF opens as expected:

The issue seems to be related to KiCAD not being able to find the system's default PDF viewer.

KiCad Version

Application: KiCad Schematic Editor x64 on x64

Version: 7.0.2, release build

Libraries:
	wxWidgets 3.2.2
	FreeType 2.12.1
	HarfBuzz 6.0.0
	FontConfig 2.14.1
	libcurl/7.88.1-DEV Schannel zlib/1.2.13

Platform: Windows 11 (build 25300), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: Apr 15 2023 19:18:27
	wxWidgets: 3.2.2 (wchar_t,wx containers)
	Boost: 1.81.0
	OCC: 7.6.3
	Curl: 7.88.1-DEV
	ngspice: 40
	Compiler: Visual C++ 1934 without C++ ABI

Build settings:
	KICAD_SPICE=ON