You've not uploaded the files properly. e.g. ./cache/themes/ folder and its files are missing.
Make sure permissions are set correctly (check in ACP -> Tools & Maintenance).
Also your board url in Configuration -> General Configuration seems incorrect. Should be:
http://qwert.yzi.me/Upload
In ACP>>General Configuration>>Board URL make sure it shows your forum URL
Then check your inc/config.php for the same thing!
P.S you should change your Board URL to
http://qwert.yzi.me/upload because currently it's set to
http://qwert.yzi.me
Yeah, i manually installed the one in Upload folder, and that forum was by my host, but the version is way too old.
But when i install it, it goes like that, this is the 2nd time.
& I followed the install instructions _PERFECTLY_ on both times.
I don't get it
What don't you get? It's simply called mess. You should have either removed the forum folder content and uploaded new files there or overwritten files there and ran the upgrade script. Using 2 folders with 2 forums is pointless waste of resources and I guess noone would like to have forum named "upload" in url.
And the solution for 2nd forum is said above 2 times. Change the URL to the correct mentioned by me and marcus.
Coxetamine,
You've simply installed incorrectly. You've uploaded the entire "Upload" folder instead of uploading the contents of the Upload folder. Hence your issues.
I suggest you remove everything, drop the database, and re-install with the files in the correct location.
If the database can't be dropped completely and re-created then you'll need to do some manual tweaking.
If you need help with doing this, follow the suggestion in the PM from Goggalor and you'll get the assistance you need with it.