Was playing PNRP earlier today, attempted to open my inventory via F3, and it refused to open. I thought, "Well this is weird. I'll just go in via F4". I did that and BLAM! It worked.
But now, (10:43 AM EST) when I attempt to go into my inventory at ALL it refuses to open. There's no errors in the console or anything. Everyone else is able to access their inventories. The only thing I can think of that could be causing the issue is that I recently installed the PNRP beta gamemode on my copy of GMOD so I could test sweps I made for PNRP.
I've also restarted GMOD and re-joined several times.