Operating system: Windows-10-10.0.18362 64 Bits
Graphics card: GeForce GTX 750 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 417.22
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: rBf6cb5f54494e
Interactively places new vertices with Ctrl-LMB at the cursor position.
The most basic element, a vertex, can be added with a Ctrl-LMB click when no other vertices are selected.
This is not working for me.
gives the solution working for me: Ctrl-RMB