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Server error 403 when previewing on Commons
Closed, DuplicatePublic


Steps to reproduce:

  1. Go to any file page on Commons.
  2. Select "Edit source" and change something.
  3. Preview.

Actual result:
Shows no preview content, only error message:

Error loading data from server: Error contacting the Parsoid/RESTBase server (HTTP 403).

Expected result:
Shows preview.

Additional information:
I tried reproducing this on a subpage to my user page, but that gave no error, even with the same content from the file page. Maybe it's dependent on the namespace somehow?

Browser: Firefox 70.0.1 (64-bit).