Problem:

I am working on a site that has a custom theme with the Classic Editor plugin active.

I have created a page that uses the block editor by using a code snippet to enable it.

I am adding a view to that page using Toolset Blocks but the custom fields I have created are not available to me when adding a Single Field block. If I disable the Classic Editor plugin all is well but I can't do that because the rest of the theme relies on it.

Is there are setting I'm missing or something else you can suggest.

Solution:
One possible solution would be:

- remove the code snippet
- go to Generals -> Writing
- in the "Allow users to switch editors" option, select 'yes' and save the page