Greetings Admiral! This is a strange and must be a rare issue as no other players reported it.
Could you please 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. 31.12.20.txt)
Please copy the latest log file and this screenshot, then contact Xsolla support team via live chat option (help.xsolla.com) or email (support@xsolla.com), describe your issue in details and attach both files.