Cannot update plugins or wordpress - authenticity could not be verified, no signature found

by machump   Last Updated September 11, 2019 17:08 PM - source

For some reason, out of the blue I am unable to update wordpress (to 5.2.3) or any plugins.

They each return a message like:

Downloading update from…

The authenticity of could not be verified as no signature was found.

Unpacking the update…

Could not create directory.

Installation Failed

The url of the message differs depending on the plugin I am trying to update. How can I work around this? I am trying to update through the dashboard. Thanks!

I have enabled multisite

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