https://bugs.winehq.org/show_bug.cgi?id=39403
--- Comment #63 from Sebastian Lackner sebastian@fds-team.de --- (In reply to Colin from comment #62)
Created attachment 58388 [details] steamwebhelper error report when I go to store
Steamwebhelper encounters a serious error after I go to store, and a blackscreen pops up. Also, I am running latest stable version of Wine (2.0.1).
This bug report can be fully worked around with the "-no-cef-sandbox" parameter. The issue you experience is unrelated. My guess would be that you are missing corefonts in your Wine prefix. You can try to install it with winetricks or use the system package if available for your distribution.