Hi James,
I already wrote to you a lengthy reply yesterday.
You should have checked that instead of double-posting.
However, what you say here provides additional information.
Clearly you are facing a keyboard layout issue where when pressing the key to the left of 1 you are producing ' instead of `, which executes Prev Or Next Symbol In Library command.
Either find on the keyboard which key produces `/~ and use that key to snap, or change your layout to English US from the OS settings.
https://www.windowscentral.com/how-change-your-keyboard-layout-windows-10
Hope this helps!