🚨 Error: c.apply is not a function. (In 'c.apply(this,arguments)', 'c.apply' is undefined)

[ampprojectbot]

Details

Error report: link
First seen: Invalid Date
Frequency: ~ 1038/day

Stacktrace

Error: c.apply is not a function. (In 'c.apply(this,arguments)', 'c.apply' is undefined)
    at (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/custom-element.js:87)
    at (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/polyfills/custom-elements.js:426)
    at upgradeSelf_ (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/polyfills/custom-elements.js:448)
    at connectedCallback_ (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/polyfills/custom-elements.js:369)
    at tree (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/polyfills/custom-elements.js:345)
    at tree (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/polyfills/custom-elements.js:344)
    at name (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/polyfills/custom-elements.js:150)
    at name (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/service/custom-element-registry.js:144)
    at win (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/service/core-services.js:55)
    at idleDeadline (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/chunk.js:200)
    at t (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/chunk.js:414)
    at (https://raw.githubusercontent.com/ampproject/amphtml/2004080540400/src/chunk.js:327)

/cc @jridgewell modified src/custom-element.js:85-87 in ampproject#27470 (Mar 30, 2020)
/cc @rsimha modified src/polyfills/custom-elements.js:448-448 in ampproject#21212 (May 16, 2019)