Can't install CentOS 6.10 on UEFI-GPT Disk

Question

So I have installed CentOS 6.10 minimal.iso for x64 bit system from their website and I have been trying all the morning to install it along Ubuntu which is already installed on a different partition, but had no luck. It gives me an error that says:

you haven't created a /boot/efi partition

I followed the suggestions in this link,

but couldn't figure out how I should create the EFI directory - I feel like it may make a difference...

The things I have tried:

1. Created a FE00 partition, formatted it as FAT32 and gave it a label of EFI. I have done that through gdisk from an UBUNTU live DVD. And through CentOS installer tried to mount that partion to /boot/efi, but it didn't work, too.

2. Created an EFI system partition from the CentOS installer and used VFAT as the filesystem type as some post that I found on the internet suggested, and mounted it to /boot/efi - without luck.

it keeps giving me the same error:

you haven't created a /boot/efi partition

This is a screenshot of my partitions as listed on gparted:

I will be so grateful if someone can help me figure it out.