Due to your other posts, it seems your Directadmin installation did not start, or was not finished yet.
The GUI is installed quickly, but everyting else is installed in the background, probably that is not done yet, or something went wrong.
Try running the setup.sh again and then like this:
DA_FOREGROUND_CUSTOMBUILD=1 ./setup.sh <yourlicensekey>
via SSH as root.
This way all is build in the foreground and you can see what is happening and when it's really ready.
Do you meet the minimal requirements?
What is your amount of RAM and Swap?