While working on a WordPress site we were prompted to update to 5.8, but the manually pushing the button to update keep failing. The process would start, but would run into errors and stop. We tried just manually moving the directories “wp-admin” and “wp-includes” from a downloaded zip of the latest version, but this didn’t help. We ended up fixing everything by removing a few plugins we had installed and were not using. Once this was done the update button worked fine. On screen the update got to the end and read “updating database…” and hung there, but going back to the Dashboard everything was fine. The site was updated to 5.8 and running fine.

Let us know if this helped you….