Valid URL not allowed as callback url (.red domain)

I’m trying to add a callback URL under application settings. The domain is, but that is not recognized as a valid URL. The domain is legit and exists so should be fine.

Hey there!

Can you try refreshing the page and adding it once more as I managed to add it as a callback:

Ahh, so sorry, my bad! I had another URL in there too, and had separated with line break instead of comma. Works as expected. Thanks!

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Perfect! Glad to hear that!