It seems like the downloaded file is corrupted.
Could you please visit the below link and manually update Lightroom.
Please let us know if it helps.
thank you but i have been trying for a couple of days now and still get the same error code. the "waiting a few minutes and trying again" option is not working.
I do not use the creative cloud and the version I already have is 6.3 and reinstalling it did not fix the issue.