There was an error classifying the move.

Got the above error while doing a game analysis. Thought you'd want to know. Game#58308610555

I don't think you broke anything.

Thanks, I didn't think I broke anything, I just thought the admins might want to know about this, to alert them with a possible bug.

Based on your screenshot, it's likely due to how many variations there are and how deep it is in those variations.

This literally happens to me every day. I think chess.com might have some throttle mechanism so their servers don't get overwhelmed. It usually goes away when I give it some time and do it again.

This just happened to me too on a checkmate. I am very sure this is an error. 

chess.com devs too lazy

I'm sure the devs are super busy, especially with managing the numbers right now.

For the record, it happens to me in this position, after I promoted to a bishop for the lols...

I find happens often with checkmate and with stalemate. not always, but a lot

The website was probably lagging.

This is happening to me for literally every game every analyzed move on once a day free game review. And I think they are purposefully doing this to make us buy premium version. I just switch to lichess analysis engine which is free and never does this nonsense thing.

I have premium and happens to me alot. More when im using a Hotspot.

I keep getting this "There was an error classifying the move." a lot. Is this a known bug or error?

I hope at some point Chesscom updates their Game Review / Analysis Tool documentation but until then, you can fix this error yourself.

The key to understanding how to fix this error is to know that the Game Review / Analysis Settings are NOT part of the left side menu All Settings Gear Icon but rather are a separate configuration that can be optimized and is stored locally on the device that you are using.

To fix this error, you need to know some basic characteristics about your device hardware. You need to know; does your machine have a modern CPU capable of multithreading and is it recognizable by the Chrome web browser, how many cores does it have, does it have a sufficient amount of RAM, does it have thermal protection that limits the number of available threads to prevent the device from overheating or from using too much battery.

For example, I have a desktop machine, a laptop and an Android tablet that I use at different times for Game Review / Analysis running in the Chrome web browser, and for each device I optimized the Analysis Tool Settings configuration for that device that is stored locally for that device.

To adjust the configuration for your device, run Game Review and open the Analysis Tool, then click the Gear icon located at the top right of the Analysis tab. A window will open to allow you to optimize the Analysis Settings for your device.

Here is my Analysis Settings page that I have optimized for my desktop machine.

and here is the Analysis Settings page that I optimized for my Android tablet.

If your machine does not have a lot of RAM, make sure you are not running anything large in the background, and if you are using a laptop or an Android tablet, you might need to keep it plugged into a charger in order to prevent excessive battery drain and thermal throttling that limits core usage. Also, for optimal performance you should generally not set the thread count to use all your physical cores but rather set it to one or two fewer than your total number of cores.