Problem accessing direct links to content

[tgurr]

Describe the bug
After replacing data-catalog-frontend with data-catalog-app I'm no longer able to access content via links, it always results in an error 404, e.g. trying to access https://opendata.domain.local/dataset/74c06c81-9fe0-439c-aba9-cd5c980a6df4 results in an entry in the Apache access.log:
[28/Aug/2020:09:32:10 +0200] "GET /dataset/74c06c81-9fe0-439c-aba9-cd5c980a6df4 HTTP/2.0" 404 268
contrary to first browsing to the main page https://opendata.domain.local and then clicking on the dataset, which works just fine, but then I also have no entry in the Apache access.log at all, so something must work different.

To Reproduce
Steps to reproduce the behavior:

1. Go directly to e.g. a dataset in a new browser tab / incognito tab 'https://opendata.domain.local/dataset/74c06c81-9fe0-439c-aba9-cd5c980a6df4'
2. See 'error 404'

Expected behavior
Being able to access content also via direct links instead of always having to browse to them manually by starting at the root page first.

Details:

• OS: Linux
• Browser: Chrome
• Version: git master