The file attached in the report has a cloth brush saved with a particle mass of 0.0, which causes all sort of issues in the solver. I don't know how that brush was created, but it does not seems to be possible to do in the current version (reset values are correct, property limits are correct and a default brush is created in versioning_defaults). This resets all brushes with an invalid value to 1.0. Reviewed By: jbakker Maniphest Tasks: T75347 Differential Revision: https://developer.blender.org/D7698