I have problems accessing hestia

when I enter he takes me out instantly from having an execution

Please provide more information

To be able to enter the panel, I have to put my username and password; several times.

when I manage to enter, and I want to add another website or do whatever, it takes me out of the panel … it is like a loop that is done

Check the browser cookies. Are they enabled?

Check the domain of the panel. Does it have a valid SSL certificate?