Import HP Aruba stencils failing again

[klui2k1]

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Describe the bug
This is probably a regression on #3076. I can't import https://github.com/girlpunk/VisioStencils/blob/master/Aruba/Switches/HPE-Aruba-Switches-small.vss into draw.io v25.0.3 while running under Firefox 133.0.3. The webapp gives an Unknown Error.

To Reproduce
Steps to reproduce the behavior:

1. Download https://github.com/girlpunk/VisioStencils/blob/master/Aruba/Switches/HPE-Aruba-Switches-small.vss
2. Import > from Device
3. Select vss file
4. See error

Expected behavior
It should import

Screenshots
If applicable, add screenshots to help explain your problem.

draw.io version (In the Help->About menu of the draw.io editor):

• draw.io version 25.0.3

Desktop (please complete the following information):

• OS: [Windows 11]
• Browser [Firefox]
• Browser Version [133.0.3]

I tested the problem in incognito/private mode with all browser extensions switched off, write "yes" below:

• Yes

Additional context
Tried with Microsoft Edge 131.0.2903.99 with same results. No extensions loaded.