Physical Printer page fails in 2.9.0 for Prusa Link connected printer

[paulz-gh]

Description of the bug

I have succesfully connected my MK4 to PrusaSlicer 2.9.0 and can upload gcode and start prints.
But when I open the Physical Printer tab I get a page with "Something went wrong" and a reload button.
Reload does not do anything.
In my browser I can connect to the printer without issues. Test button in the printer config page also works..

Project file & How to reproduce

Click on Physical Printer tab
Starting slicer with --loglevel 5 shows:

[2024-12-23 09:41:14.842729] [0x0000000209b0c240] [info]    No configuration updates available.
[2024-12-23 09:41:20.049769] [0x0000000209b0c240] [error]   0x14a1bf000 WebViewPanel error: wxWEBVIEW_NAV_ERR_OTHER url: file:///Applications/Original%20Prusa%20Drivers/PrusaSlicer.app/Contents/Resources/web/other_loading.html
[2024-12-23 09:41:23.268571] [0x0000000209b0c240] [debug]   received message from Physical printer page: {"event":"reloadHomePage"}
[2024-12-23 09:41:23.321797] [0x0000000209b0c240] [error]   0x14a1bf000 WebViewPanel error: wxWEBVIEW_NAV_ERR_OTHER url: file:///Applications/Original%20Prusa%20Drivers/PrusaSlicer.app/Contents/Resources/web/other_error.html
[2024-12-23 09:41:24.619502] [0x0000000209b0c240] [info]    UserAccountCommunication activate: active false
[2024-12-23 09:47:48.406331] [0x0000000209b0c240] [info]    UserAccountCommunication activate: active true
[2024-12-23 09:47:49.588011] [0x0000000209b0c240] [info]    UserAccountCommunication activate: active false

Checklist of files included above

• Project file
• Screenshot

Version of PrusaSlicer

2.9.0

Operating system

macOS 15.2

Printer model

MK4