Update: I have confirmed that when accessed remotely (from another computer), the admin dashboard is only available via HTTPS at port 4433. :8080/admin is available on localhost only.
In order for it to work, the CORS settings need to be enabled for port 4433 as well:
HostIPAddress:4433 POST / GET / PUT / DELETE
Note: From your earlier comment it seems you have admin dashboard working on port 4433. FYI the server has an updated admin certificate, which will come out in next release. In case you have any problem with it, please wait and test with next release.
-------------------------Original Post-----------------------------------------
The admin port is set to 8080 by default. If you would like to change the default value of admin port (typically for deployment), it can be changed using Command Line/ Terminal option "--admin-port=[number]", for example:
"C:\Wakanda\Wakanda Server.exe" "C:\solutions\invoices.waSolution" "--adminport=8090"
Will change solution invoices's admin port to 8090.
You can find more options in the documentation.