When I flag a question as a duplicate it says 404
44368
404 error during flagging a question
147259
How can I view the responses to the questions that I have flagged?
126639
Massive 404 attack with non existent URLs. How to prevent this?
107235
Why doesn't my question show up?
128880
"Marked as duplicate" text doesn't make sense for questions that have no answer
10353
Duplicate flag lists "you have already raised this flag" after flagging as "Unclear what you're asking"
25324
Flagging a deleted answer results in a message saying I am flagging too quickly
81134
What decides what to prepend the duplicate question list with on a duplicate question?
105704
Question closed as duplicate with  and also shown as "Possible duplicate"
78861
Why are there two separate boxes about duplicate questions?
36780
How to redirect to a 404 in Rails?
113626
"Close as duplicate" - what if only the answer is a duplicate?
3685
Confirming that my own question is a duplicate by voting to close should have immediate effect
77845
Flagged as low quality, declined, but I still think the question was low quality
124046
Why won't my PHP app send a 404 error?
135386
Should bug-report/feature-request *questions* that duplicate Grab-bag *answers* be closed as duplicates?
130860
What to do when your question has an old, stale, unanswered duplicate?