Sharpen AI v 2.2.2 mask brush does not show

I was using Sharpen AI today (v 2.2.2). Sometimes, the brush does not show after I click on the mask button. The cursor changed into a hand icon not a brush. Any ideas?

Please go to the Help menu, click on Graphics info, then press Copy and paste the info here.

Application & Version: Topaz Sharpen AI Version 2.2.2

Operating System: Windows 10 Version 2009

Graphics Hardware: GeForce GTX 1650/PCIe/SSE2

OpenGL Driver: 3.3.0 NVIDIA 460.89

CPU RAM: 16103 MB

Video RAM: 4096 MB

Preview Limit: 6367 Pixels

It should appear like this, I cannot see an issue so I would suggest raising a support request at the Topaz Labs main website: