🚨 Error: Doc factory failed: amp-mustache: d is not a function

Details
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**Error report:** [link](http://go/ampe/COvjqbrDoN7czQE)
**First seen:** Mar 17, 2021
**Frequency:** ~ 48/day

Stacktrace
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Error: Doc factory failed:  amp-mustache: d is not a function

    at src/service/template-impl.js:303:6

    at src/service/extensions-impl.js:495:10

    at forEach (src/service/extensions-impl.js:493:26)

Notes
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`@dvoytenko` modified `src/service/template-impl.js:302-307` in [#3682](https://github.com/ampproject/amphtml/pull/3682) (Jun 21, 2016)
`@dvoytenko` modified `src/service/extensions-impl.js:494-499` in [#10992](https://github.com/ampproject/amphtml/pull/10992) (Aug 28, 2017)
`@renovate-bot` modified `src/service/extensions-impl.js:493-493` in [#27350](https://github.com/ampproject/amphtml/pull/27350) (Mar 30, 2020)

**Seen in:**
- 03-18 Nightly (0351)

**Possible assignees:** `@dvoytenko`

/cc @ampproject/release-on-duty