For some reason whenever I try to trade at /warp grass, my minecraft will crash. Idk why, but if you guys could look into that, that would be great. (Also sorry if this is in the wrong section)
This is the correct section. I'm not an expert on technical aspects of things, but this is the first time I've heard of this issue, which makes me think it's something wrong with your Minecraft. I would try Optifine. It helps with a bunch of client-based issues, such as lag. And it's the only thing I know to "prescribe" xD
You could try programs like Gamebooster or a mod like Optifine. Those will reduce lag, if the thing causing it is lag. To check press F3 in game, look up at the top left corner and you'll see your Frames Per Second, anything below 10 is going to make you lag a lot. Precautions when playing or to reduce lag could be to close every other program, servers can cause a lot of lag due to members moving and having to be rendered etc. Minecraft may have "Low graphics" but it's a highly graphical game which is weird but true, think about all the air blocks and regular blocks in each chunk and the amount of chunks. You may also want to play with your video settings, grabbing Optifine will give you more options. Other than lag reduction it could be a problem with your minecraft, possibly uninstall minecraft then re-install, don't forget to save worlds and screenshots though. That's all I have, if I helped, good, if I didn't. Sorry.