Luci session time out

Novice here

Archer C7 V2

Trying to load DD-WRT but kept getting the 18005 error.
Loaded LEDE: Then the Luci Gui.

Now when Luci comes up I get an immediate session expired message and I cannot go any further.

Any help would be appreciated.

Clear your browser's cookies for the page, as the first step.

Deleted cookies and it show Luci is not starting properly, GUI not loading.

I installed openvpn-openssl and ip-full by the command line in Putty, I will try to remove and see what happens.

Thank you for the reply,