EigenGradCAM without gradients?

[SzittyaPetro]

I find this repository really useful, but I stumbled uppon an anomaly in the example notebook. It uses EigenGradCAM which had 0 gradients are loaded. Is that a known issue or am I missing something? I've tried it out locally and it gave me tha exact same output as the EigenCAM variant.

Update:

• if I run it in a mode where gradients are calculated it fails on my machine.