I don’t know what to answer because I am a computer tech. This message has never showed up before.
Also will this affect my Android and Ipad roon remote because both of them are not connecting to my Mac mini core? The Android remote froze at “loading album” and the Ipad at “loading album” then the roon page disappeared from the screen.
Well, it looks as though somehow your Roon Core on your Mac mini has got upgraded from version 1.8 to version 2.0. Since your other devices (your Android phone, the iPad and the PC) are still on version 1.8, the communication between them and the Core is broken.
My suggestion would be to manually upgrade these devices to Roon version 2.0 to re-establish communication with the Core again. Go to the Roon Labs download page and download and install the relevant Roon software for your devices.