Hi @Jorge Cerbo ,
Welcome to Q&A forum!
This could be due to the recent security updates that were installed on your SharePoint server.
There are some methods you can try:
1, According to KB5002639,this update will affect SharePoint workflows. It is recommended to check the ULS logs.
You might experience an issue in which SharePoint workflows can't be published because the unauthorized type is blocked. The issue also generates event tag "c42q0" in SharePoint Unified Logging System (ULS) logs.
If this is the case, you can try the solution provided in the article.
2, You can try restarting the SharePoint Timer Service and see if that resolves the issue. If not, you may need to check if there are any other updates or patches that need to be installed to fix this issue.
3, Check if the SharePoint 2010 Workflow service is running properly. You can do this by going to Central Administration -> Application Management -> Manage services on server and checking if the service is started. If it is not started, try starting it and see if that resolves the issue.
Good day!
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