Page Builder does not appear in Magento 2

Magento 2.4.2-p1
Porto theme

In:

  • Stores > Settings > Configuration – in the left panel under General > Content Management > Advanced Content Tools – Enable Page Builder is set to Yes

When adding a new CMS Page, it does not appear at all:

Content > Pages > Add New Page

> I have selected Enable Page = Yes 
Assigned a Page title and Content Heading

Directly underneath the Content heading is a button ‘Edit with Page Builder’ and a graphic of a rectangle with a hand and an arrow underneath which it says:

Drag Row, Columns, Tabs, Block, Dynamic Block or HTML Code here

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When I click on the Edit with Page Builder button – I get the following page. There is absolutely NO way possible to open any kind of a window here to enter text whatsoever:

enter image description here

How do I actually paste code or text into the Page?