How do I fix minecraft? Error message and more info included below

The game crashed whilst rendering overlay
The game crashed whilst rendering overlay
Error: duh: Unable to fit: minecraft: burning_skull - size: 64x64 - Maybe try a lower resolution resourcepack?

I've never downloaded a resourcepack, so I don't think that's the problem. The latest update was working for me last night, but when I went on Minecraft just now it wasn't working.

I tried deleting and redownloading it, but it hasn't worked.

I had this one dream that wasn't quite lucid dreaming?

In this dream I was aware I was in a dream but I still had no control over anything. My dream self acknowledged i was in a dream and then made myself wake up. The dream goes as follows:
"
So I'm at my desk, playing Minecraft. I see a sheep enclosure, not a turtle enclosure, and across the water our island that has everything on it. But half the island was like made out of quartz. I'm like "oh that's cool."
I'm in a call, Parker and Andrew are talking about a new movie that's going out
I'm exploring the island, thinking "I'm surprised my laptop can handle this. It couldn't before."
I say something else about the island, only for no response.
And then I realize, "this isn't my moms computer." I'm at my dads. And I'm not in a call.
I reel back, turn off Minecraft, turn off the computer. Look around me. I'm in my room at my dads.
So I lay my head on the table, and close my eyes, trying really hard to relax myself; I need to get back to my moms.
I wait. Then open my eyes. I'm still here. I check my surroundings one more time before laying my head back down, closing my eyes. I wait, then open one eye. I'm still at my dads. Then, with all my determination, I open my other eye. And I woke up."
Everything on the internet only talks about lucid dreaming. But I didn't have enough awareness to get out. Does anyone know what type of dream this was, and also what it meant?

Minecraft 100 Days Achievement?

In the achievement I know that you have to play for 100 days, which I read translates to 30 something hours, but my question is, it is 100 days in a single world, or does it add up the time for all your worlds?