HSX_E_DEV_SESSION_MULTI_APP
Dev session spans multiple HubSpot apps.
What this error means
One HubSpot dev session can serve UI extensions from only one app at a time.
When this error stops a command, hs-x exits with code 10. With --json, the failure is reported as a structured error whose code field is HSX_E_DEV_SESSION_MULTI_APP — stable to match on in scripts and agents.
Likely causes
- The selected components belong to more than one app in the project IR
How to fix it
- Pass
--componentand select components that belong to the same app
Still stuck? Re-run the command with --debug for the wire-level detail, or hs-x doctor to check accounts, link state, and connectivity in one pass.
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