I installed Ubuntu along side my Linux Mint and removed Linux Mint after that. I didn't use my laptop for a while and when I opened it yesterday. It went into the GRUB rescue menu. I have tried the set prefix method but didn't work. Luckily I had the old bootable USB stick and I logged into "Try Ubuntu" and deleted the partitions of the previous Ubuntu OS. In fact, I deleted all of the partitions because I don't have anything important on them and I tried to install from the USB stick.
I have tried nearly 10 times now, but it's not happening. I tried different things like "Minimal installation", with internet, without internet, etc.. None worked. It keeps on loading and I have waited over four hours but nothing happened.
I got "partition creation failed" error a couple of times. I don't have any other desktops to reburn the USB with OS. I am now running on "Try Ubuntu" to even ask this question. Please help.