I have been running Windows 10 1903 for a while and I was having problem with Sandboxie 5.30. These problem seem to have cleared up with Version 5.31.1
I tested the following programs this morning and have found not problems
Windows 10 build 18362.19n1_release.190318-1202
I use all these for my business [Remote Desktop Support]
Microsoft Chrome Edge version 76.0.176.1 64 Bit
Vivaldi 2.5.1525.48 (Stable channel) (64-bit)
Chrome Version 74.0.3729.169 (Official Build) (64-bit)
Adobe Acrobat Reader DC Version 2019.012.20034
Internet Explorer 11 Version 11.116.18362.0
Firefox Quantum Version 67.0.1 (64-bit) [had to fix the proxy server setting to automatic]
Thanks to the Sandboxie Team
Bill e. Barrett