DeepSOIC asked for a file, although the step by step description is not difficult. Please consider that everyone who wants to take part in the discussion has to go through it, which is in fact a waste of time, so I attach my file here.
- load file
- select Sketch001
- click the groove icon
Here it works well, the screenshot was made directly after the click on the groove tool. Please retry with a current 0.19 version. Since new versions contain not only new things but also many bug fixes. You should always check if the bug is already removed in the current version.

- Bildschirmfoto 2019-08-25 um 08.23.33.png (18.8 KiB) Viewed 338 times
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OS: macOS High Sierra (10.13)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.17798 (Git)
Build type: Release
Branch: master
Hash: 7e60631239109c632a8f6cca83f6e7e5502e43a1
Python version: 3.7.3
Qt version: 5.9.7
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/Germany (en_DE)