Hi I found a way for outlook to work again, instead of using the app that came with windows
1. Press the windows button and type CMD ( DON’T CLICK IT)
2. Right click on the CMD and say “ Run as Administrator”
3. Then type SFC /scannow and press enter.
4. If the program finishes please restart the computer if the problem persists repeat the process. This may work on the first try but sometimes after the 2/3 attempt.
The cause for the problem is windows files that got corrupted during the upgrading process. The above will repair the corrupt files and outlook will be able to send emails again.