Sendmessage tool disappeared

[u/Fickle_Mix_6119]

My computer did an update this morning. Since then SendMessage has stopped working. When I ask it why it says:

SendMessage was removed from this session by the harness partway through, with a note not to search for it. I can't tell you why — it isn't something the project or I did, and I have no visibility into the reason.

Before the update I was using the SendMessage tool a lot. The whole structure of the project was using it for subagents as well as a management system where one chat had authority over a grouping of chats. Was using it as a tool to have a level of separation so that one area of work was not allowed to touch other sections and had to put in requests to the manager chat of a different department. My whole project is broken without this tool.

if you can save me, I will love you forever