Steam not loading with steamwebhelper disabled

[mio-19]

steamwebhelper.sh[21222]: Runtime for steamwebhelper: defaulting to /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-heavy
steamwebhelper.sh[21222]: glibc >= 2.34, partially disabling sandbox until CEF supports clone3()
steamwebhelper.sh[21222]: CEF sandbox already disabled
steamwebhelper.sh[21303]: Runtime for steamwebhelper: defaulting to /home/user/.local/share/Steam/ubuntu12_64/steam-runtime-heavy
steamwebhelper.sh[21303]: glibc >= 2.34, partially disabling sandbox until CEF supports clone3()
steamwebhelper.sh[21303]: CEF sandbox already disabled
src/steamUI/steamuisharedjscontroller.cpp (529) : Failed creating offscreen shared JS context
src/steamUI/steamuisharedjscontroller.cpp (529) : Failed creating offscreen shared JS context
src/steamUI/steamuisharedjscontroller.cpp (529) : Fatal assert; application exiting
src/steamUI/steamuisharedjscontroller.cpp (529) : Fatal assert; application exiting
_ExitOnFatalAssert

my ~/.box64rc

[steamwebhelper]
BOX64_EXIT=1

Maybe it is not needed anymore?

cmd

steam +open steam://open/minigameslist -noreactlogin

[CalcProgrammer1]

Steam requires steamwebhelper now, the old trick of using minigameslist does not work anymore.