Do you have a PreTeXt project that relies on a version 2.15 WeBWorK server? PreTeXt will end support for WeBWorK 2.15 on August 1, 2024 (or soon thereafter).
Note that if you have a PreTeXt HTML book hosted somewhere and it relies on a 2.15 WeBWorK server, it will continue to work just fine. This notice is about *building* your project's HTML with up to date PreTeXt following August 1. That is what will no longer work.
WeBWorK version 2.19 will be released this summer. You might want to upgrade your own server to version 2.19 when it is released, or at least to 2.18 in the meantime.
The AIM WeBWorK server at
webwork-ptx.aimath.org is currently version 2.17, and you might be able to use that server for your needs. That server will be upgraded to 2.19 later this summer.