Trying on 2 servers.  No luck.  Get this in logs.  I am not trying to update to 9.01 and Dashboard button says it is an update to UNA 10.  

I have 3rd server I am not updating.  I don't see an update log - I do see an update module log.  Last successful update was 5/15 or so and after that an error - can't get a list of modules. It is a beta site with 500 users. I assume all there data will be lost updating the site.  No one is going to lke that. 

Every time I click the update button the same error is thrown in the log. 

--------- 2019-06-25T15:02:01+00:00

9.0.0-9.0.1 upgrade will be applied

Files permissions are ok and can be overwritten

ERROR:Files copying failed