**System Information**
Operating system:
Graphics card:
**Blender Version**
Broken: (example: 2.80, edbf15d3c044, master, 2018-11-28, as found on the splash screen)
Worked: (optional)
**Short description of error**
Onion Skinning does not work
{F7629787}
**Exact steps for others to reproduce the error**
Based on the default startup or an attached .blend file (as simple as possible).