Error thrown when attempting to remove not installed subscription

Environment

• Browser and full version: 104.0.5112.79
• Extension using this toolkit: test-mv2
• Commit hash: 0.6.0

Steps to reproduce

Run EWE.subscriptions.remove("https://example.com/filters.txt").

Actual behavior

The following error is thrown:

Uncaught (in promise) TypeError: Cannot read properties of null (reading 'id')
    at Object.remove (subscriptions.js:466:1)

Expected behavior

No error is thrown.