<p>The file is missing. When i try to save an edit made with iD a popup window comes up (for login or oauth stuff) with the url mydomain/land.html and content 404.<br>
I created the file in the public folder content from here <a href="https://github.com/openstreetmap/iD/tree/master/dist">https://github.com/openstreetmap/iD/tree/master/dist</a> and now it is working as expected.<br>
Maybe someon can look into this trivial issue. Thanks</p>

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