In case it helps here is the log file:
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: @(#)PROGRAM:Install PROJECT:Install-1000
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: @(#)PROGRAM:Installer PROJECT:Installer-965.1
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Hardware: iMac16,2 @ 2.80 GHz (x 4), 16384 MB RAM
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Running OS Build: Mac OS X 10.15.6 (19G2021)
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: USER=donotuse
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: PATH=/usr/bin:/bin:/usr/sbin:/sbin
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: LOGNAME=donotuse
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: SSH_AUTH_SOCK=/private/tmp/com.apple.launchd.N8gUO5ACJ3/Listeners
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: HOME=/Users/donotuse
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: SHELL=/bin/zsh
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: __CF_USER_TEXT_ENCODING=0x1F5:0x0:0x0
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: TMPDIR=/var/folders/4j/ysns583900x6hsy3rrcn8mx80000gn/T/
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: XPC_SERVICE_NAME=com.apple.installer.4048
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Env: XPC_FLAGS=0x0
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: MacOS Adobe CC Shared Device License Installation Log
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Opened from: /Users/donotuse/Desktop/MacOS Adobe CC Shared Device License_Install.pkg
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Package Authoring Error: <background_scaling> has an unsupported MIME type: X-NSObject/NSNumber
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Package Authoring Error: <background_alignment> has an unsupported MIME type: X-NSObject/NSNumber
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Failed to load specified background image
Sep 10 14:30:30 ip-10-135-28-254 Installer[1174]: Referenced component packages (1) trustLevel=100
I would recommend contacting the support team directly so that we can check the logs and find the cause of the issue by initiating a chat session, click on the chat icon on the bottom right corner of this page: https://helpx.adobe.com/support.html.