The full error message is -
Fatal error: Cannot redeclare class AkeebaUsagestats in /home/<cpanel-name>/public_html/administrator/components/com_akeeba/assets/stats/usagestats.php on line 4
I saw one ticket from a few days ago and was going to add to it, but couldn't see how to - last entry was today. I have the identical problem. When updating (haven't tried a new install) the updates stall on Akeeba Backup and give me an unformatted screen - no graphics, just text. If I refresh the admin returns t normal and the update has happened fine. However, is I'm doing multiple updates, any after AB don't get processed.
I checked with my host regarding PHP caching and they confirmed none of those are active on my server.
It's more an annoyance than a failure and just requires a refresh.