Hyperlink – options no longer available

When creating or editing a page when I click on the link the options button comes up but when I click on it, the page freezes. I have to reload to continue working. Everything worked fine last week so something has changed. I’ve updated to WP 5.5.1. Another change is I can no longer use the text editor. Visual is OK but text not. Help!

The page I need help with: [log in to see the link]

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