[Bug 49255] New: wineboot fails to start

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=49255

Bug ID: 49255
           Summary: wineboot fails to start
           Product: Wine-staging
           Version: 5.9
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: critical
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

After installing the latest staging (5.9), 'winecfg' gives the following error:

002c:err:module:__wine_process_init failed to load
L"C:\windows\system32\wineboot.exe", error c0000018
0024:err:environ:run_wineboot failed to start wineboot c0000018
0024:fixme:actctx:parse_depend_manifests Could not find dependent assembly
L"Microsoft.Windows.Common-Controls" (6.0.0.0)
0034:err:module:__wine_process_init failed to load
L"C:\windows\system32\explorer.exe", error c0000018
003c:fixme:actctx:parse_depend_manifests Could not find dependent assembly
L"Microsoft.Windows.Common-Controls" (6.0.0.0)
003c:err:winediag:nodrv_CreateWindow Application tried to create a window, but
no driver could be loaded.
003c:err:winediag:nodrv_CreateWindow The explorer process failed to start.

I've removed/cleaned all files and reinstalled both staging and development a
number of times over the past 1-2 weeks and each time get the above error,
though stable works fine.

I'm on Xubuntu 20.04, AMD64, installed from official repo. A number of others
report the same...
https://www.reddit.com/r/wine_gaming/comments/gkbxp6/getting_error_about_dri...