How to add custom background in ID Editor?

Hello all, I want to add this map as a background for editing in the ID Editor.
When I attempt to add it (Background>Custom>Paste the link) the background just goes black (data stays, same as if you select “None”). Is this map incompatible with the ID Editor? I can get it to work in JOSM. Am I just not using the right link? Is it being applied to the map in a different location? I zoomed out and panned around and couldn’t find it.

Link outside of hyperlink:

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iD doesn’t support the EPSG:26925 projection used by the layer. That’s why it isn’t available in iD to start with.

Easiest workaround would likely be to install a maproxy instance and use that to reproject.