I did the same with my second machine with WIN 8.1. The same problem, the same error message. Atgtached pls find the content of the debug log file.
2017-08-01 13:14:15.535 DEBUG [9084] [MainUI::buttonScanClicked@294] [i] Scan button clicked (-31986) 2017-08-01 13:14:15.538 DEBUG [8304] [MainUI::Entry@1271] [+] Checking for update... 2017-08-01 13:14:16.040 DEBUG [8304] [AdwCleanerSDK::checkCA...