Jeames, I’ve already tried with the deactivation of plugins. Also with 0 plugins the error remain the same, update failed. The problem is inside the 5.0 release.
Sorry James, could be that I’ve not described the problem in the right way. The problem is the same of an other topic inside the support that is “publishing fail” where I didn’t see a right answer. I use Generate Press and I don’t want to change the theme (also because I don’t want to waste time to do trials in order to solve a problem of the new release of WordPress).
If you think that this is the only solution it would means that we need to change Kernel and use the other that are growing up over 200% instead of 15% of wordpress.