visudo not taking my changes?

Hello, I'm doing this online course and I'm trying to set the ansible user so that it does not need to use sudo, per the instructor's direction. ( I know this isn't good security best practices)

System = CentOS 7
ansible 2.9.6

Code:[ansible@host folder]$ $ id
uid=5001(ansible) gid=5001(ansible) groups=5001(ansible),10(wheel) context=system_u:system_r:unconfined_service_t:s0He says I need to

Code:$ sudo visudo

## Allows people in group wheel to run all commands
#%wheel ALL=(ALL) ALL

## Same thing without a password
%wheel ALL=(ALL) NOPASSWD:ALLThis seems to be consistent with other blogs I read about the subject.
https://www.tecmint.com/run-sudo-com...assword-linux/
https://www.cyberciti.biz/faq/linux-...ut-a-password/

However when I go to test I get:
Code:[ansible@host folder]$ visudo
visudo: /etc/sudoers: Permission deniedI feel like this is the root cause of what is messing me up. In a later chapter, I'm trying to edit this file and it also will not open without sudo

Code:[ansible@host folder]$ ansible-vault edit secret.yml
Vault password:
ERROR! Unable to read source file (/opt/data/edu/hoa-svv/handson-ansible-github/chapter_examples/ch5/secret.yml):
[Errno 13] Permission denied: u'/opt/data/edu/hoa-svv/handson-ansible-github/chapter_examples/ch5/secret.yml'but when I do

Code:[ansible@host folder]$ sudo ansible-vault edit secret.ymlit opens fine.