🚨 Error: undefined is not a function

Details
---
**Error report:** [link](http://go/ampe/CIqHyuPgtd_0Lw)
**First seen:** Apr 12, 2022
**Frequency:** ~ 290,233/day

Stacktrace
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Error: undefined is not a function

    at forEach (src/service/ampdoc-impl.js:359:12)

    at getMeta (src/service/ampdoc-impl.js:385:25)

    at getMetaByName (src/consent.js:120:23)

    at getConsentPolicy_ (src/custom-element.js:525:30)

Notes
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`@alanorozco` modified `src/service/ampdoc-impl.js:359-359` in [#38004](https://github.com/ampproject/amphtml/pull/38004) (Apr 4, 2022)
`@mdmower` modified `src/service/ampdoc-impl.js:385-386` in [#26687](https://github.com/ampproject/amphtml/pull/26687) (Feb 27, 2020)
`@mdmower` modified `src/consent.js:120-120` in [#26687](https://github.com/ampproject/amphtml/pull/26687) (Feb 27, 2020)

**Seen in:**
- 04-22 Control (1712)
- 04-22 Stable (1712)
- 04-29 Experiment-B (2129)
- 04-29 Experimental (2129)
- 05-04 Nightly (1533)
- +2 more

**Possible assignees:** `@alanorozco`, `@mdmower`

/cc @ampproject/release-on-duty