trouble updating to 5.3.2

Hi,
I’ve been having trouble updating to the latest version today. First it came up with an error message wordpress-5.3.2 could not be verified as no signature was found. Then after a while after it failed I tried again and got the “an update is already in progress” message. Thought it wasn’t updating. I deleted the core updater lock table and tried again to only get just a generic The site is experiencing technical difficulties. Please check your site admin email inbox for instructions message. The email never comes through I don’t know what the error is.

This a site set up offline with a localhost set up through mamp. It use to be so easy updating but I’ve running into all sorts of issues with the latest few releases.