Plugin disable/enable not working after upgrade
I recently successfully updated to 2.1.6 from 220.127.116.11. However within my Dashboard, I cannot disable or enable plugins; I click the button, no error messages, but the screen refreshes and no change to the plugin's status.
Perhaps related, it seems that the EMailSubscribe plugin is not working to send email notifications.
I'm on an IIS server, if that matters.
Any tips on things to check/how to resolve would be greatly appreciated.