Sending solutions doesn't work

[xaslx]

Hi, I've been having this error for a few days now, and it happens on every task.

1. I've tried clearing my browser.
2. Turning VPN on/off.
3. Disabling all extensions, such as ad blockers and others.
4. I've tried changing browsers.
5. I've tried a different provider, as well as using my phone's mobile data.

Nothing helped.

[hobovsky]

It seems that there was another user affected by similar issue, can you check if their solution helps in your case? #3413 (comment)

[Gecko51]

You've eliminated most of the obvious stuff already. Without the actual error message it's a bit of a stab in the dark, but here's where I'd dig next:

Open DevTools (F12), go to the Network tab, then click "Attempt" or "Submit" on a kata. Look for a request that fails (red status or 4xx/5xx). The one that matters usually goes to runner.codewars.com or starts with /api/v1. Whatever shows up in that response body tells you what's actually happening.

Also check the Console tab at the same time, anything in red there is useful, especially CORS errors or "blocked by client" messages.

A few things that have caused this kind of silent failure for people:

Third-party cookies disabled. The runner lives on a different subdomain so killing third-party storage breaks the whole submission flow. In Firefox especially, Enhanced Tracking Protection sometimes flags codewars.com. Try setting the shield to "Standard" for the site or adding codewars.com to exceptions.

Stale auth session. Do a full logout, clear codewars.com cookies specifically (not just history), then log back in.

A browser extension you forgot about. Try a Chrome incognito window with all extensions disabled, that rules it out cleanly.

Can you share the error text you actually see, plus the failing request from the Network tab? Without that it's mostly guessing.