Hi, I’ve been using Anki now for a couple of years now, with no issues. The last couple of weeks, I haven’t been able to sync neither my phone or desktop, always getting this error: [image] I’ve trying with my home, work and mobile networks and always got the same issue. It doesn’t seem to be a d…

Just tried this and also received the 404, but I do not have any antivirus software on this device.

seeing a 404 like the others, also not running antivirus

Optimizing parameters shouldn’t require a one-way sync – but I don’t know what you mean by optimizing cards. One-way syncs are explained in more detail here: Syncing with AnkiWeb - Anki Manual .

seeing a 404 like the others, also not running antivirus (2)

@Neff207 @Rink3192 @JojoKim @rdant In this case the 404 error is the success case. That means your computer can see AnkiWeb, and something else is going wrong. Again, a wave of reports like this almost always resolves by itself. For anyone who cannot wait to sync, you can manually copy your collec…

Same goes for me. It was working well with me yesterday, all of a sudden, it just doesn’t want to sync.

I’ve also got a 404 from that URL. I’m fro Latam, Argentina.

Tks Danika, I’ll wait until tomorrow to try to sync.

the same error here. I’ll try again tomorrow

Sync error: error sending request for url ()

Anki Syncing & AnkiWeb

AD15 January 7, 2026, 1:06am 21

Having the same issue. Tried all fixes but not working

Topic		Replies	Views
Persistent syncing error Syncing & AnkiWeb	15	311	January 11, 2026
Can't sync Connection timed out. Please try again. I Syncing & AnkiWeb	28	862	June 28, 2026
Issue syncing cards Syncing & AnkiWeb	17	612	December 5, 2024
"Error decoding response body" sync error Help	72	5692	February 3, 2021
Cannot Sync My AnkiWeb Account (Timeout) Syncing & AnkiWeb	16	443	January 19, 2026

Sync error: error sending request for url ()

Related topics