fix: Cannot set property response of undefined

[sainthkh]

• Closes Cannot set property response of undefined #8858

User facing changelog

Fix the flaky "Cannot set property response of undefined".

Additional details

• Why was this change necessary? => This causes flaky failures.
• What is affected by this change? => N/A
• Any implementation details to explain? => This failure happened because request is sometimes undefined. But sendContinueFrame assumes that request is always non-undefined. Fixed this problem.

How has the user experience changed?

N/A

PR Tasks

• Have tests been added/updated? => How should I test this?
• Has the original issue or this PR been tagged with a release in ZenHub?
• [N/A] Has a PR for user-facing changes been opened in cypress-documentation?
• [N/A] Have API changes been updated in the type definitions?
• [N/A] Have new configuration options been added to the cypress.schema.json?

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