u/Fluffy_Pressure_4396

After Arc for Windows updated to V1.104.0 / Chromium 147.0.7727.13*, my browser started crashing around Spaces/sidebar.

• Arc crashes everytime upon opening
• Reset, Reinstall doesnt help
• Reinstall brings back default account. This temporarily helps, but doesnt last long
  • Arc opens fine on the default Space.
  • Switching to certain Spaces causes instant crash.
  • Renaming/changing icon/color sometimes temporarily helps, but the issue returns.
  • I converted one broken Space into a folder under General; opening that folder still crashes or makes the sidebar buggy.
  • Eventually Arc stopped launching reliably

From inspecting `StorableSidebar.json`, it looks like `sidebar.containers[1].items` sometimes contains full item objects where Arc expects string item IDs. So this seems like a sidebar data migration/compatibility bug, possibly triggered by the 1.104.0 update.

Update: solved by switching to Zen with an Arc 2.0 skin