Resolved: Trending issue: problems with Workflows after applying September 2024 CU for SharePoint 2016/2019/SE
In September 2024 CU a new security fix was included which added a restriction for Workflow actions. Only actions in namespaces which are explicitly allow listed by an administrator through an authorizedType entry in the web.config and owstimer.exe.config can be used. As this modification is also required for workflow actions in 1st party assemblies shipped […]