RedisDesktopManager/docs/known-issues.md

Why I get error : db X (Loaded XXX of YYY. Error - XXXXXX)

You get this error if connection error occurred, or if you use unofficial port of redis for Windows - stable work of Redis Desktop Manager guaranteed only for latest version of Official Microsoft Redis port (https://github.com/MSOpenTech/redis/tree/2.6/bin/release)

Black screen instead of Welcome tab on Windows under VirtualBox

Remove opengl32sw.dll and Copy this dll to RDM installation folder

Graphical glitches on Ubuntu (RDM 0.7.9+)

It's the well-known problem of Qt Quick components.