🚨 Error: undefined is not an object (evaluating 't.querySelectorAll')

Details
---
**Error report:** [link](http://go/ampe/CIyug823tMH2JQ)
**First seen:** Jan 9, 2022
**Frequency:** ~ 804/day

Stacktrace
---

Error: undefined is not an object (evaluating 't.querySelectorAll')

    at querySelectorAll (extensions/amp-next-page/1.0/service.js:722:18)

    at forEach (extensions/amp-next-page/1.0/service.js:354:7)

    at updateVisibility (extensions/amp-next-page/1.0/service.js:532:13)

    at devAssert (extensions/amp-next-page/1.0/visibility-observer.js:296:19)

    at this (extensions/amp-next-page/1.0/visibility-observer.js:95:37)

    at position (src/service/position-observer/position-observer-worker.js:103:20)

    at src/service/position-observer/position-observer-worker.js:133:77

Notes
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`@renovate-bot` modified `extensions/amp-next-page/1.0/service.js:722-722` in [#27350](https://github.com/ampproject/amphtml/pull/27350) (Mar 30, 2020)
`@renovate-bot` modified `extensions/amp-next-page/1.0/service.js:353-354` in [#27350](https://github.com/ampproject/amphtml/pull/27350) (Mar 30, 2020)
`@wassgha` modified `extensions/amp-next-page/1.0/service.js:531-535` in [#26296](https://github.com/ampproject/amphtml/pull/26296) (Jan 23, 2020)
`@wassgha` modified `extensions/amp-next-page/1.0/visibility-observer.js:280-304` in [#26778](https://github.com/ampproject/amphtml/pull/26778) (Apr 9, 2020)
`@wassgha` modified `extensions/amp-next-page/1.0/visibility-observer.js:95-95` in [#26778](https://github.com/ampproject/amphtml/pull/26778) (Apr 9, 2020)
`@zhouyx` modified `src/service/position-observer/position-observer-worker.js:94-118` in [#10813](https://github.com/ampproject/amphtml/pull/10813) (Sep 8, 2017)
`@rsimha` modified `src/service/position-observer/position-observer-worker.js:133-135` in [#21212](https://github.com/ampproject/amphtml/pull/21212) (May 16, 2019)

**Seen in:**
- 01-07 Beta (1715)
- 01-07 Experiment-B (1715)
- 01-07 Experimental (1715)
- 01-14 Nightly (1909)

**Possible assignees:** `@wassgha`, `@zhouyx`

/cc @ampproject/release-on-duty