Service portal designer completely blank

[AshleyMartin]

Trying to make changes to my Service Portal but the designer page is just completely blank. I'm on Tokyo, attached is a screenshot.

[RaghavSh]

This is probably a cache issue, the workaround would be open the page from "sp_page" table and from the related list select "open in page designer" or page editor.

[Saurav11]

Hello,

Please check the below article for the same:-

https://support.servicenow.com/kb?id=kb_article_view&sysparm_article=KB0720497

Please mark my answer as correct based on Impact.