We noticed that this error: No matching template found shows up with different WordPress themes.
We tried cleaning up the cache, changing to other default WordPress themes but it didn't work.
Solution
Try installing a different theme to see if the problem will still persist.
If you have access to wp-cli you can run this command to install and activate Astra theme
wp theme install astra --activate
If you don't have access to wp-cli then go to Appearance > Themes > Add New Theme and search for Astra.

Extra info
This ticket has some extra info. They talk about template experiments.
https://github.com/WordPress/gutenberg/issues/18209
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