FBX animations doesn't work

Hello, I am trying to upload this model Character_Rigged - 3D model by Ochikatzu [4bc6042] - Sketchfab with a walk animation from blender in fbx format, I tried in other 3d viewers (marmoset viewer and windows 3d viewer) and it works perfectly fine, but it doesn’t look like this in sketchfab, I can see the rigging but no animation at all in 3d settings.

What do you think I’m doing wrong?

Thanks in advance

Make sure you select your model or A if you want to select all and I hover over the timeline with the key frames and click A to select all the key frames then export.

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