HELP!!! My Forum Is Missing A LOT of icons!

[CrazyChef]

I've been pulling my hair out trying to figure this out. I've searched the forum, but didn't see an answer. There are numerous icons missing from my forum, yet the functionality is still there - just the icon image is missing. Any idea why this is happening? The style is UI.X2 / Shades of Grey, and XF2.3.4.

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HELP!!! My Forum Is Missing A LOT of icons!

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