Human Resources menu doesn't display after according access rights - by: Ragnar

Hi,
I have some problems about human resources menu. To have the access, I go on Access Rights > Modules management and then I check the Human Resource item, then I click on "Apply changes". It reloads the page but the human resources menu is not displayed. Do you know what can be the origini of this issue ?
I am coding some improvements on the Employee page, but the only access is doing what I explain up here, so I can't work on those improvements.

Thank you in advance for your response