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title Troubleshooting

Quick fixes for the most common issues.

"command not found: vibium"

The npm global bin directory isn't on your PATH. Either add it (npm config get prefix will show you where), or skip the global install entirely and use npx:

npx -y vibium go https://example.com

If you plan to use Vibium repeatedly in a session, alias it once:

alias vibium='npx -y vibium'

The browser doesn't appear

By default Vibium runs a visible browser. If you don't see a window:

  • You may be on a headless host (e.g. a CI runner or a remote server with no display). That's expected; capture commands like screenshot and text still work.
  • Google Chrome for Testing may still be downloading on first use. Re-run the command after it finishes.

"no element matches" from find

Vibium matches semantically: visible text, label, placeholder, role. If nothing matches:

  • The page may not be ready yet — try vibium wait before finding.
  • The text may differ from what you expect — vibium text will show you the actual rendered content.
  • The element may be inside a closed <details>, a hidden tab, or a shadow root that requires scrolling or expanding first.

A reference like @e3 doesn't work anymore

References are stable while the page is unchanged, and each find or map output defines the current @eN set. If the page navigated or re-rendered, run vibium map (or vibium diff map) to refresh. Get into the habit of running wait after any action that triggers navigation.

Custom binary path

The Python and Java clients honor VIBIUM_BIN_PATH if you need to point at a locally built binary:

export VIBIUM_BIN_PATH=/path/to/your/vibium

MCP server won't start

Run the server directly to see the error message:

vibium mcp

If the bundled browser hasn't been downloaded yet, run any normal command first (for example vibium go https://example.com) so the download completes, then restart your MCP client.

Recordings are huge

vibium record captures a screenshot per step. Long sessions produce big zips. If you only need a final snapshot, use vibium screenshot instead of record.

Where to ask for help

  • Bugs in the vibium binary, library, or MCP server — file an issue at https://github.com/VibiumDev/vibium/issues.
  • Mistakes, gaps, or unclear writing in these docs — file an issue against this docs repository.

When reporting a runtime bug, please include:

  • Your platform and architecture (uname -a or equivalent).
  • The exact command you ran and the full output.
  • The Vibium version (vibium --version).
  • A record.zip from a vibium record session reproducing the problem, if you can.