CORS error Code won't save and does not get marked as completed

When I try to save my code, I get the “An error occurred trying to save your code.” Also when I pass the test, it is not marked as completed. I do not have any extensions enabled so I’m not sure what else could be the issue.

I had the same issue trying to turn in the personal portfolio project on the most recent archived responsive web design course. I can say my browser had been open for a few days, I tried refreshing, no help. I closed the browser and re opened it, no help, and I also tried another browser, still no help.

I tried those too and had no luck as well.

I don’t know why is that happening, but the response from the server is 403 and the console shows:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.freecodecamp.org/save-challenge. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing). Status code: 403.

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This also happens with me):

Is everyone else also trying to finish an archived course?