This is the log for this failure.
30/03/2019 7:45:49,97 - Info: Starting WSUS Offline Update download (v. 11.6.1) for w100-x64 glb
30/03/2019 7:45:49,99 - Info: Option /includedotnet detected
30/03/2019 7:45:50,02 - Info: Option /verify detected
30/03/2019 7:45:50,05 - Info: Option /exitonerror detected
30/03/2019 7:45:50,36 - Info: Set time zone to LOC4:00
30/03/2019 7:45:50,55 - Info: Preserved custom language and architecture additions and removals
2019-03-30 07:45:51 URL:http://download.wsusoffline.net/StaticDownloadFiles-modified.txt [0/0] -> "../static/StaticDownloadFiles-modified.txt" [1]
2019-03-30 07:45:51 URL:http://download.wsusoffline.net/ExcludeDownloadFiles-modified.txt [0/0] -> "../exclude/ExcludeDownloadFiles-modified.txt" [1]
2019-03-30 07:45:52 URL:http://download.wsusoffline.net/StaticUpdateFiles-modified.txt [0/0] -> "../client/static/StaticUpdateFiles-modified.txt" [1]
30/03/2019 7:45:52,63 - Info: Updated static and exclude definitions for download and update
30/03/2019 7:45:52,63 - Info: Restored custom language and architecture additions and removals
30/03/2019 7:45:55,00 - Info: Downloaded/validated mkisofs tool
30/03/2019 7:45:56,68 - Info: Downloaded Sysinternals' tools Autologon, Sigcheck and Streams
30/03/2019 7:54:22,67 - Info: Downloaded/validated most recent Windows Update catalog file
30/03/2019 7:54:22,69 - Warning: Deleted unsigned file "D:\Instaladores\SO\wsusoffline\client\wsus\wsusscn2.cab"
30/03/2019 7:54:27,49 - Error: Catalog file ..\client\wsus\wsusscn2.cab signature verification failure