 TOOLTIP: Option "container" Error

When using this library I am getting the following error:
`jquery.min.js:2 Uncaught Error: TOOLTIP: Option "container" provided type "undefined" but expected type "(string|element|boolean)".`
 
I am using Summernote 0.8.9 and Boostrap 4.

Solutions such as including 'Container: false' as a setting have not worked.