I see your DISM.log has the command:
DISM.EXE: Executing command line: dism.exe /online /enable-feature /featurename:NetFX3 /Source:f:sourcessxs /LimitAccess
The problem with the command is you have an extra space between DISM and /Online which will cause the command to fail. I would try typing the command in if you're attempting to copy and paste it in.