It is hard to see without debugging why exactly it is not moving, but at a glance here are few things I noticed:
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On your screenshot a speed is set > 0 (green dot, I believe speed value is 300), but your character is not moving on a preview pane.
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Unless it is by design, but usually idle and walk/run animations are combined into one blendspace, so you do not need to use extra states.
you can place “print string” node in your event graph to see what speed you are passing into your animation. Also, (probably you already did that, but still) make sure that animation on a character blueprint is not paused.
