ajv-i18n no work in IE11?

[jingyuLin1999]

I use ajv-i18n in vue@2.x. I just import "ajv-i18n", it work in chrome but it show error for me in IE11.

"ajv": "^6.12.6",
"ajv-errors": "^1.0.1",
"ajv-i18n": "^4.0.0",

.vue
const Ajv = require("ajv") // version >= 8.0.0
const localize = require("ajv-i18n") // error in IE11