Failed to connect to session's ZeroMQ Sockets: Provided sockets combination is not compatible

System details:

Positron and OS details:

OS: Windows
Test ran in CI. See trace report.

Describe the issue:

R session failed to start up with this error:
Failed to connect to session's ZeroMQ Sockets: Provided sockets combination is not compatible

Nothing fancy happened in the test. It just attempted to start a R session and was greeted with the error. I've included screenshots to show the step by step behavior. The only odd things I noticed was the runtime list looking like it wasn't fully loaded before interacting and some notifications on bottom right containing errors.

Steps to reproduce the issue:

1. Open Start a New Session menu

2. Type in name of runtime and select it

3. Verify runtime starts - FAIL

Expected or desired behavior:

Runtime should start w/o error.

Were there any error messages in the UI, Output panel, or Developer Tools console?

• Failed to connect to session's ZeroMQ Sockets: Provided sockets combination is not compatible

• 

• Logs are attached in the trace report.

Start with the linked Playwright trace report for the “validate can delete sessions” test and reproduce the Windows R-session startup failure. Trace the ZeroMQ socket connection path from the session-start flow. Done means the runtime starts successfully without the incompatible-sockets error and the affected test passes.