Admiral.
Could you please try follow this guide and contact directly Xsolla support team:
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. 1.10.21.txt)
Please copy the latest log file, then contact Xsolla support team via live chat option (help.xsolla.com) or email (support@xsolla.com), describe your issue in details and attach the log file, and the screenshot with errors you posted above.
Please keep us updated on the problem, hope it will be resolved soon! Xsolla is awaiting your details
We will try to bring the game to Steam as soon as possible but we cannot provide any dates right now