Hi,
My wordpress verison – 5.3.2.
When i go to edit any page, i click on + to add some gutenberg blocks, and there is “reusable blocks” section and under the Reusable blocks section, there is a ‘Manage All Reusable Blocks’ link. Click on the link and it will take you to a page where you can see all your saved blocks. From this page, you can click to edit any block. Right there i got an error, which i described above.
I tryed to debug js file from your plugin, and saw that meta.twitterCardType and other values are undefined.
On the other pages (not reusable) meta.twitterCardType has some value, so no errors are coming.
