I do not speak Japanese, but I had the same issue upgrading from 8.5.7 to 8.5.9. The way I solved it is… pretty odd…
Before the upgrade from 8.5.7 to 8.5.9, I visited 2 pages: The homepage, and a different page. Like the contact page or the about us page.
After the upgrade, I got the same error as you.
This is what fixed this for me:
concrete/bin/concrete5 orm:generate-proxies
Then I visited both the contact page, and the home page. I got 6 errors saying ““continue” targeting switch is equivalent to “break”. Did you mean to use “continue 2”?” I’ve edited all “continue” to “continue 2” and the websites worked again.
I hope this fixes it for V9!