Same to me, is really annoying. I deleted an binance account , created new one and paired with newly created binance api tax reports key as was suggested with message from koinly and not working so far!
There can unfortunately be some spikes here and there if the servers are put under a lot of stress, but we are constantly working on making improvements to keep a more stable performance.
I will report this however and make sure we look into it in case there’s any bigger issue going on.