Is the signature damaged?

It’s doing that for me too, on all my sites.

i have the same problem!

Furthermore I found that if I tried to install the update again it appears to work. Not sure why but tested twice and it installed. I cant say if it installed everything as it should though. Hopefully someone attends to this shortly and provides some insight.

Me too, same error

i had the same problem!
But like @doubledworks it worked by doubled work ??

After waiting approx 24 hours and testing the installation twice, it now appears to work fine. Given the problem appears to be resolved and I created this support thread I am marking this issue as resolved.

Double work did the trick ??