Similar here. Other updates load but the monthly "Service Packs" fail.
My May update is also still broken.
The error codes have changed.
I have tried the whole loop of troubleshooting again with no results.
Luckily the troubleshooting hasn't broken anything.
Sadly this is typical Microsoft. You don't really get any tech support anymore.
Likely some code they released broke something.
It may take until the next big release to fix this.