Comment 0 for bug 1873996

https://bugs.chromium.org/p/chromium/issues/detail?id=1071961

Steps to reproduce the problem:
1. Ctrl+Shift+I or right-click, click Inspect
2. Navigate to chrome://inspect/#pages, click inspect
3.

What is the expected behavior?
DevTools to open

What went wrong?
DevTools does not open.

Did this work before? Yes Chromium 83

Chrome version: 84.0.4115.5 Channel: dev

$ chromium-browser --temp-profile

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.509: Theme parsing error: gtk.css:597:14: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.509: Theme parsing error: gtk.css:597:14: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.509: Theme parsing error: gtk.css:600:17: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.510: Theme parsing error: gtk.css:784:14: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.510: Theme parsing error: gtk.css:784:14: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.510: Theme parsing error: gtk.css:787:17: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.511: Theme parsing error: gtk.css:1096:14: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.512: Theme parsing error: gtk.css:1096:14: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.512: Theme parsing error: gtk.css:1099:17: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.517: Theme parsing error: gtk.css:2286:8: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.517: Theme parsing error: gtk.css:2286:18: Using Pango syntax for the font: style property is deprecated; please use CSS syntax

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.517: Theme parsing error: gtk.css:2291:8: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.517: Theme parsing error: gtk.css:2291:18: Using Pango syntax for the font: style property is deprecated; please use CSS syntax

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.523: Theme parsing error: gtk.css:4357:14: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.523: Theme parsing error: gtk.css:4357:14: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.523: Theme parsing error: gtk.css:4419:12: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.523: Theme parsing error: gtk.css:4419:12: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.523: Theme parsing error: gtk.css:4428:16: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4428:16: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4443:22: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4443:22: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4499:12: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4501:16: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4501:16: Expected a string.

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4549:12: not a number

(chromium-browser:21919): Gtk-WARNING **: 03:41:50.524: Theme parsing error: gtk.css:4549:12: Expected a string.
MESA-LOADER: failed to retrieve device information
MESA-LOADER: failed to open i915 (search paths /usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load driver: i915
MESA-LOADER: failed to open kms_swrast (search paths /usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load driver: kms_swrast
MESA-LOADER: failed to open swrast (search paths /usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load swrast driver
[21919:21919:0421/034207.195874:ERROR:CONSOLE(1)] "Uncaught TypeError: Cannot read property 'Runtime' of undefined", source: devtools://devtools/bundled/root/root-legacy.js (1)
[21919:21919:0421/034207.195989:ERROR:CONSOLE(1)] "Uncaught TypeError: Cannot read property 'Runtime' of undefined", source: devtools://devtools/bundled/root/root-legacy.js (1)
[21919:21919:0421/034207.197368:ERROR:CONSOLE(70)] "Uncaught TypeError: Cannot read property 'setInspectedTabId' of undefined", source: devtools://devtools/bundled/devtools_compatibility.js (70)
** Message: 03:42:21.246: Remote error from secret service: org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.Secret.Collection' on object at path /org/freedesktop/secrets/collection/login
** Message: 03:42:21.252: Remote error from secret service: org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.Secret.Collection' on object at path /org/freedesktop/secrets/collection/login
ubuntu-studio@ubuntu-studio:~$
(chromium-browser:22305): Gtk-WARNING **: 03:46:11.735: Theme parsing error: gtk.css:597:14: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.735: Theme parsing error: gtk.css:597:14: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.735: Theme parsing error: gtk.css:600:17: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.736: Theme parsing error: gtk.css:784:14: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.736: Theme parsing error: gtk.css:784:14: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.736: Theme parsing error: gtk.css:787:17: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.738: Theme parsing error: gtk.css:1096:14: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.738: Theme parsing error: gtk.css:1096:14: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.738: Theme parsing error: gtk.css:1099:17: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.743: Theme parsing error: gtk.css:2286:8: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.743: Theme parsing error: gtk.css:2286:18: Using Pango syntax for the font: style property is deprecated; please use CSS syntax

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.743: Theme parsing error: gtk.css:2291:8: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.743: Theme parsing error: gtk.css:2291:18: Using Pango syntax for the font: style property is deprecated; please use CSS syntax

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.749: Theme parsing error: gtk.css:4357:14: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.749: Theme parsing error: gtk.css:4357:14: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4419:12: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4419:12: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4428:16: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4428:16: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4443:22: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4443:22: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4499:12: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4501:16: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4501:16: Expected a string.

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.750: Theme parsing error: gtk.css:4549:12: not a number

(chromium-browser:22305): Gtk-WARNING **: 03:46:11.751: Theme parsing error: gtk.css:4549:12: Expected a string.
MESA-LOADER: failed to retrieve device information
MESA-LOADER: failed to open i915 (search paths /usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load driver: i915
MESA-LOADER: failed to open kms_swrast (search paths /usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load driver: kms_swrast
MESA-LOADER: failed to open swrast (search paths /usr/lib/i386-linux-gnu/dri:\$${ORIGIN}/dri:/usr/lib/dri)
failed to load swrast driver
[22305:22305:0421/034620.183897:ERROR:CONSOLE(1)] "Uncaught TypeError: Cannot read property 'Runtime' of undefined", source: devtools://devtools/bundled/root/root-legacy.js (1)
[22305:22305:0421/034620.183967:ERROR:CONSOLE(1)] "Uncaught TypeError: Cannot read property 'Runtime' of undefined", source: devtools://devtools/bundled/root/root-legacy.js (1)
[22305:22305:0421/034620.185275:ERROR:CONSOLE(70)] "Uncaught TypeError: Cannot read property 'setInspectedTabId' of undefined", source: devtools://devtools/bundled/devtools_compatibility.js (70)
Fontconfig error: Cannot load default config file: No such file: (null)
[22305:22305:0421/034638.655575:ERROR:CONSOLE(1)] "Uncaught TypeError: Cannot read property 'Runtime' of undefined", source: devtools://devtools/bundled/root/root-legacy.js (1)
[22305:22305:0421/034638.655697:ERROR:CONSOLE(1)] "Uncaught TypeError: Cannot read property 'Runtime' of undefined", source: devtools://devtools/bundled/root/root-legacy.js (1)
[22305:22305:0421/034638.656908:ERROR:CONSOLE(70)] "Uncaught TypeError: Cannot read property 'setInspectedTabId' of undefined", source: devtools://devtools/bundled/devtools_compatibility.js (70)
** Message: 03:46:42.108: Remote error from secret service: org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.Secret.Collection' on object at path /org/freedesktop/secrets/collection/login
** Message: 03:46:42.114: Remote error from secret service: org.freedesktop.DBus.Error.UnknownMethod: No such interface 'org.freedesktop.Secret.Collection' on object at path /org/freedesktop/secrets/collection/login
^C