Dashboard – disappearing issue

Hi,

since my Wp2.3 install I have been having a small issue.

If I go into my dashboard via:

https://www.artbymichaelking.com/wp-admin/

it shows up no problem (I get to the above url by just clicking the “site admin” text on my main home page.)

but if I am already in the admin area and decide to go back to the ‘dashboard’ it takes me to this link:

https://www.artbymichaelking.com/wp-admin/index.php?page=index.php

which displays nothing in the dashboard area.

Any ideas what the issue may be?

Thanks!