Admiral, if you are sure the game launcher is not blocked, please try this workaround:
open Windows Command Prompt (press Windows + R), then type:
%HOMEPATH%\AppData\Local\Ultimate Admiral Dreadnoughts\log
There will be log files from the launcher (e.g. 12.04.21.txt)
Please copy the latest log file and a screenshot with the problem, then contact Xsolla support team via 24/7 live chat option (help.xsolla.com) or email (support@xsolla.com), describe your issue in details and attach both files.