Does anyone know what this error is?

I am running unifi 5.10.17 in a docker container and since updating to 5.10 I am getting this error. It’s not causing any real issues I just don’t know what it is:

I don’t know what it is, but I can confirm that you’re not the only one getting this. Interestingly, it’s also three errors in my container. I suspect that 3 is hardcoded as the number of retries. Judging by the httpclient package, this looks like some sort of HTTP request that’s going on there.