🚨 Error: Cannot read properties of null (reading 'then')

[ampprojectbot]

Details

Error report: link First seen: Mar 2, 2021 Frequency: ~ 22,058/day

Stacktrace

Error: Cannot read properties of null (reading 'then')
    at then (src/inabox/inabox-resources.js:234:25)
    at buildReadyResources_ (src/inabox/inabox-resources.js:130:9)
    at upgraded (src/custom-element.js:1193:32)
    at appendChild (extensions/amp-carousel/0.1/build-dom.js:231:20)
    at forEach (extensions/amp-carousel/0.1/build-dom.js:225:9)
    at element (extensions/amp-carousel/0.1/build-dom.js:286:31)
    at buildDom (extensions/amp-carousel/0.1/slidescroll.js:433:6)
    at buildCallback (src/custom-element.js:549:30)

Notes

@calebcordry modified src/inabox/inabox-resources.js:220-238 in #31777 (Jan 8, 2021) @calebcordry modified src/inabox/inabox-resources.js:129-130 in #32432 (Feb 4, 2021) @samouri modified extensions/amp-carousel/0.1/build-dom.js:224-233 in #36602 (Nov 17, 2021) @samouri modified extensions/amp-carousel/0.1/build-dom.js:224-233 in #36602 (Nov 17, 2021) @samouri modified extensions/amp-carousel/0.1/build-dom.js:280-292 in #36602 (Nov 17, 2021) @samouri modified extensions/amp-carousel/0.1/slidescroll.js:432-454 in #36602 (Nov 17, 2021) @dvoytenko modified src/custom-element.js:539-553 in #32568 (Feb 25, 2021)

Seen in:

• 02-23 Stable (0359+1)
• 03-17 Stable (2113)
• 03-23 Beta (1914)
• 03-23 Experiment-B (1914)
• 03-28 Nightly (1422)
• +4 more

/cc @ampproject/release-on-duty

[samouri]

Dupe of https://github.com/ampproject/error-reporting/issues/157