Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which package are you using?

@sentry/tracing

SDK Version

7.8.0

Framework Version

express 4.18.1, node 16.15.0

Link to Sentry event

No response

Steps to Reproduce

1. Update @sentry/tracing to 7.8.0.
2. Start the app
3. Wait for incoming request

Expected Result

Requests to the server are processes properly without any errors.

Actual Result

Each request fails with the following error (probably related to #5450):

TypeError: partialRoute.split is not a function
    at Function.process_params (./main.js:2:1855298)
    at next (./main.js:2:2554914)
    at Function.handle (./main.js:2:2553813)
    at router (./main.js:2:2552432)
    at ./main.js:2:1853557
    at Layer.handle [as handle_request] (./main.js:2:2560503)
    at trim_prefix (./main.js:2:2555773)
    at ./main.js:2:2555055
    at Function.process_params (./main.js:2:2555954)
    at Function.process_params (./main.js:2:1856043)