A web address typed, bookmarked or pasted with a trailing slash - /screen-recorder/, /forms/, /vault/ and others - returned a 500 error, while the same address without the slash worked. Those addresses now redirect to the single canonical form and open the page as expected.
Addresses ending in a slash open the right page
Links such as /screen-recorder/ and /forms/ returned a server error instead of the page. They now open normally.