Found out that someone else already posted the issue with a error which I now found too in my Project.
1) Name of tool
2) A brief description of the issue
Polybrush doesn't seem to work with ProBuilder Objects. I checked the documentation on how to solve this problem, I tried the recommended solutions but it still doesn't work for me.
I'm not sure if I'm doing something wrong with setting up the tools. But I'm following the documentation. There aren't any errors that I think are related to it. But if there is any information I can post, I will.
If someone want's to check the project I will upload it.
3) Your system environment (Operating system, version of Unity, version of tool)