Save As Dialog Box Flickers and Disappears - Photoshop Elements 2020 - Mac OS Catalina

[velocity_13]

Here are my configurations:
- Mac OS 10.15.1 (Catalina)
- MacBook Pro (13-inch, 2018)
- Processor 2.7 GHz Quad-Core Intel Core i7
- Memory 16 GB 2133 MHz LPDDR3
- Photoshop Elements 2020 (18.0 (20190827.m.136736) x64

When I try to click 'Save As’, the dialog box flickers then disappears. Same thing happens with ‘Save’ and ‘Save Quit’. I can’t save any projects.

I made a screen recording showing the problem: https://youtu.be/WHOFvXO88EU

[Jeff Arola]

See if turning off your Wi fi makes any difference.

[velocity_13]

I tried switching off the wifi before launching PSE and there's no difference. The saving problem still persists.
Thanks for your answer though.