Extension not found error

[jamesobutler (James Butler)]

The oddness and inconsistency is likely the existing known instability of the factory Linux build machine.

No extensions are being built for Linux stable (5.8)

Reviewing CDash, we can confirm that yesterday extensions were built for both: Stable: CDash: https://slicer.cdash.org/index.php?project=SlicerStable&date=2025-02-02&filtercount=1&showfilters=1&field1=site&compare1=63&value1=metroplex Extensions: https://extensions.slicer.org/catalog/All/33216/linux Preview (aka Nightly): CDash: https://slicer.cdash.org/index.php?project=SlicerPreview&date=2025-02-02&filtercount=1&showfilters=1&field1=site&compare1=63&value1=metroplex Extensions: https://e…