Admiral, were you able to play the game in the past?
As the first workaround, please try to fully reinstall the game by this guide:
1) Uninstall the game from launcher, then uninstall the launcher, after that make sure no temporary files remained:
2.1)
Press Win+R then type: %HOMEPATH%\AppData\LocalLow\Game Labs\
Right click on Ultimate Admiral Dreadnoughts folder and delete it
2.2)
Open Windows Command Prompt (press Windows + R and type cmd, press enter afterwards)
type: regedit
Go to HKEY_CURRENT_USER\SOFTWARE\Game Labs\Ultimate Admiral Dreadnoughts
Right click on Ultimate Admiral Dreadnoughts folder and delete it
Close regedit
3)
Open Windows Command Prompt (press Windows + R), then type: %HOMEPATH%\AppData\Local\
delete the folder Ultimate Admiral Dreadnoughts if it is there
4) Install the launcher and download the game