Can't access admin area, No wrench, No max limit, No project help

Hello I am trying for a lot of time to upload a file and so create a repository, I wonder how can I since it is not letting me with this error .

It tells me to change the max size of file but I cannot acces admin area I wonder how, If I am not able by any way to acces the admin area… the wrench… help

I suppose you’re self-hosting gitlab?

Self hosting what do you mean ?
I though you guys hosted everything…

While I could upload 300 mb I could not 500+