Problems running texture pack

Hi, I'm a big MC fan, but I also love Star Wars, so I made a small texture pack for Java 1.16.5 replacing sword textures with lightsaber textures. I know how to make a pack but when I add the completed pack to the resourcepacks folder, nothing shows up and a bubble appears in the top right corner saying its failed to copy the pack. Is there any advice you can give? Before anyone says it, yes I have pack.mcmeta (I put it in the assets folder and the normal place, just to make sure). I've tried both .zip and standard foder and I use WinRAR. For some reason, the .zip folder icon is now the same as WinRAR. I don't know what else it could be. I use Windows 10 for those who are wondering, and I've had no trouble with packs in the past. Yes, this is my first time making a pack myself but I've checked several online sources eg WikiHow for reference and I can't find where I've gone wrong. Any advice?