Thanks jainpraveen12​. I will try this shortly. Do you have any idea why Multifield also doesn't work on Page Properties? Could it be a similar missing class?

Yes, it was already cq:Component. The problem is really the page type. Which is annoying because I didn't want to include the standard page properties tabs.

I just noticed it works if I add     sling:resourceSuperType="wcm/foundation/components/page" to the template page.Is there any way to avoid this? I don't want all the standard page properties to show up.

I just ran into the same exact issue from this posting: data-sly-resource Not EditableAll the same except the solution from that post doesn't work in AEM 6.3.My template's page is a single line:<div data-sly-resource="${@path='productCard', resourceType='mysite/components/content/productCard'}"></di...

As a temporary work-around, we've determined that the RTE works fine if you save (Create Page) and then re-open the Page Properties in edit mode.

jainpraveen12​ the useFixedInlineToolbar=true was already in use, so that's not the cause of this issue.Here's the dialog xml:https://drive.google.com/file/d/17c5WDoa17CCLCpVfolcrOj1-M2MS1obi/view?usp=sharing

smacdonald2008 It's for a description field which we need to reference in other pages. Think of a page containing a really long article, and then having a requirement to create a "top articles of the month" page where you want to pull in just the titles and summaries of those original articles.

I also tried #1 and #2 and it made no difference.

jainpraveen12​, it is not possible to type anything into the single line, it does not accept input focus. So #3 cannot be reproduced.Why can't I make it behave the same in Page Properties as it does in a Component Dialog?

Apparently the vaultClipse project is defunct: