Rest Api 403 Response with one account but 200 with another

Hi everyone, I’m having problems consumin Jira REST Api:

When I make the call to any endpoint (/issueType, /projects, /issues) with a generic account using basic auth, I get a 403 Forbidden.
But, if I use my own account or any other account (using Basic Auth) to consume the same endpoints I get the correct Answer with a 200 and the info I need.

Someone knows why this happens or what can be blocking it? Thanks in advance.

Note: This Generic Account has the same access rights and permissions as the accounts that are working (also, this generic account was working a week ago, it was something happen from one day to another).