A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
The most likely cause is a server-side expiration on Microsoft's end. It is highly probable that a security certificate, data service contract, or API token used by Microsoft to connect to their data provider (Refinitiv/LSEG) expired on December 31, 2025, and was not automatically renewed. So if that's the case, it's a Super Simple Fix--that's the Good News. Here's the Bad News--until someone gets around to renewing the token, we are Dead in the Water. The Problem, is no one can get a message to the Technical Team who's responsible. That means until time goes by and people start complaining over and over and over again, it won't get to the person who just needs to renew the token. If this were a small company, it can be done in the course of a couple minutes--I'm speaking from experience here. This is as simple of a fix as you can get.