Glitch when using UE4

So I’m trying to work on my own RPG (following the Virtus Learning Hub RPG tutorial) and as I was working, I’d suddenly get this glitch which makes it almost impossible to do any work. I was wondering if anyone else has experienced this before and/or if you have any suggestions of what I could do about it? I’m 1 week into my summer holidays and have 2 months till I head back to college (doing Games Development, finished the first year) so I want to learn how to use UE4, but that’ll be very difficult with these glitches. I’m using my laptop by the way, and it’s an ASUS X555YA-XX119T series with 1 TB HDD storage and 8 GB RAM, and the project is saved in the laptop. I’ll post an image of a screenshot of the glitch.