It is just a configuration issue. As I've already mentioned you should add those fields in the Account tab as well. You've just added those fields on the Profile tab, those are not the same.

Please watch the video and do all steps for the rest of the fields: 

https://www.screencast.com/t/cJtPHk44

Could you please send the admin login details to infogvectors.com email address? I'll ask the developers to check the issue for you. 

The fields are well added. They are also displayed perfectly for new members when they fill them out. On the other hand, a former member, when he wants to edit his account, the fields do not appear

Please navigate to Dashboard > Forums > Member Fields > Tab Manager admin page, edit the "Account" tab, make sure the fields are added in the active fields section and press on the "Save" button. 

Hello,
For my admin account, when I go to https://tennis2table.com/forum/account/jerome I cannot fill in the fields (they do not appear). Here is a screenshot.. 

No issues found here.

Simply the members don't fill the values from the account page. Once members filled the values in the account tab, the values will be displayed in the account tab. 

Please note on the profile pages where is only values that membres filled in the account tab. More info in this support topic: https://gvectors.com/forum/postid/24704/

If you add the fields in the account, profile, etc tabs it'll be displayed for all users. It doesn't matter if the account is just created or he/she already has it.