Toolbox Display Error - no text shows (RESOLVED)

Faced the same problem, versions 1.21.9547 and the latest current 1.21.9712 (Windows 10 Pro 21H1 build:19043.1110 Russian)

Found the workaround. There are multiple issues that lead to the failure of graphics to render correctly, mostly related to the graphics API and video drivers, as I understood from the issue tracker:

https://youtrack.jetbrains.com/issue/TBX-6535
https://youtrack.jetbrains.com/issue/TBX-6479
https://youtrack.jetbrains.com/issue/TBX-6452
https://youtrack.jetbrains.com/issue/TBX-6508
https://youtrack.jetbrains.com/issue/TBX-6506
https://youtrack.jetbrains.com/issue/TBX-6461

You are expected to add the following to the .settings.json file which resides in  %LOCALAPPDATA%\JetBrains\Toolbox\  directory:

"internal": {
    "graphics_api": "Software"
},

- but bear in mind to follow the structure of JSON (or you will get the same issue after the Toolbox is started, the logfile will show you the parsing error), this will be correct if your .settings.json file already have some settings, for instance, the whole file's settings at my machine at the moment:

{
    "internal": {
        "graphics_api": "Software"
    },
    "jetbrains_account": {
        "active": "*******"
    }
}

Initially, I faced several parsing issues during the Toolbox starts up. Firstly I tried to remove that %LOCALAPPDATA%\JetBrains\Toolbox\  directory in order to flush all settings (please don't do that, you will lose all the IDEs installations), so after when I reinstalled the Toolbox and tried to start it up my .settings.json file had only:

{
}

and of course, you can't just add this block instead:

"internal": {
    "graphics_api": "Software"
},

The correct block is:

{
    "internal": {
        "graphics_api": "Software"
    }
}

- comma "," (after the trailing brace of "internal" parameter) is needed only if the next setting is coming after.

Can confirm this resolved it for me

Thanks Muhammet, that worked