Blank White page when trying to start new game or puzzle.

By that logic we would all need to be using the same adblocking utility. There are numerous different types of adblocker tools, and if it were related to the utility then it would also be apparent on more than a single website.

At least a few people have solved the issue by turning off ad block or whitelisting the site. While I don't personally use ad block software, I would image some use a similar process or list of IPs as part of their process. And you're also assuming that different ad block software is being used.

Add that to the fact the site isn't aware of any change that would cause the issue.  I certainly won't say that a site change might not be the root cause, but if members with the issue haven't attempted turning off or disabling plugins, then that would certainly be a first step. If that solves the problem, that is helpful information.

If that doesn't help, adding additional details, including exact browser, browser version, and any add-ons plugins would be very helpful.

I just know I've tested with Firefox 97 and have zero issues 

I agree accurate revision and utility information is required to properly debug faults.  It has already been established that the problem does not exist in the current prod 96.0.3 FF release with a disabled ad blocker, if you are on 97 beta release with no ad blocker then obviously it is not expected to be an issue there either.  If you want to test it, load an add on such as ghostery or similar.  If users experience this problem with their browser, the first step in identifying the issue is to run in safe mode, if it is still evident then check the browser patch history and roll back if necessary.  If its not a problem in safe mode then it is likely an add on you will need to disable, or to create an exception.   BTW - It is not unusual for support tiers to be unaware of platform patches, it depends whether you are talking to the service desk or the sys prog.

It's not just support but those involved in handling the bug reports and fixes that aren't aware of anything done site-wise that could be causing it.

I had the same issue. I remove the adblock "Ghostery" for chesscom and it is working properly again. My advice is to use "uBlock Origin" which works perfectly without involving a blank page on chesscom.

I just had this issue, and was told to disable my adblocker for chess.com. I did, didn't work. But what did work was disabling other extensions on chess.com, in my case it was Ghostery. Try disabling anything and everything on chess.com, it might fix it.

I mentioned that utility above - Ghostery extension is your Adblocker.  I do not expect this behavior would be confined to a single add-on, it will include any utility blocking the CHESS.COM moatheader data collection/analytics java script which is initiated when you start a game or puzzle.  This appears to be the reason for the white screen issue on your browser, on the server side there must have been a change in January that requires a response from that script running successfully before serving up content.  I can see there have been a number of  similar incidents since 2017, if CHESS.COM support were to run a debug session with a client browser to emulate the fault, then the problem would be more obvious.

Most people that I've seen with the issue that fixed it have been with Ghostery. Might be an old version of the plugin causing it.

Something about css resource "was preloaded using link preload in Early Hints but not used within a few seconds from the window's load event."