just installed, and TypeError: this._items[key].slice

[dimaslanjaka]

typescript:

import { create as createXML } from 'xmlbuilder2';
const sourceIndexXML = join(__dirname, 'views/sitemap.xml');
const sitemapIndexDoc = createXML(readFileSync(sourceIndexXML).toString());

xml:

<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="sitemap.xsl"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
</sitemapindex>
<!-- XML Sitemap generated by Dimas Lanjaka -->

error occurs:

TypeError: this._items[key].slice is not a function
    at NamespacePrefixMap.copy (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/@oozcitak/dom/src/serializer/NamespacePrefixMap.ts:34:46)
    at ObjectWriter.BaseWriter._serializeElementNS (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/writers/BaseWriter.ts:353:25)
    at ObjectWriter.BaseWriter._serializeNodeNS (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/writers/BaseWriter.ts:224:14)
    at ObjectWriter.BaseWriter._serializeDocumentNS (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/writers/BaseWriter.ts:838:12)
    at ObjectWriter.BaseWriter._serializeNodeNS (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/writers/BaseWriter.ts:227:14)
    at ObjectWriter.BaseWriter.serializeNode (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/writers/BaseWriter.ts:200:12)
    at ObjectWriter.serialize (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/writers/ObjectWriter.ts:63:10)
    at XMLBuilderImpl._serialize (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/builder/XMLBuilderImpl.ts:685:21)
    at XMLBuilderImpl.end (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/xmlbuilder2/src/builder/XMLBuilderImpl.ts:610:43)
    at sitemapindex (/media/dimaslanjaka/DATA/Repositories/gh-pages/src/gulp/tasks/sitemap/index.ts:44:65)
    at Object.<anonymous> (/media/dimaslanjaka/DATA/Repositories/gh-pages/src/gulp/tasks/sitemap/index.ts:52:1)
    at Module._compile (node:internal/modules/cjs/loader:1101:14)
    at Module.m._compile (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/ts-node/src/index.ts:1455:23)
    at Module._extensions..js (node:internal/modules/cjs/loader:1153:10)
    at Object.require.extensions.<computed> [as .ts] (/media/dimaslanjaka/DATA/Repositories/gh-pages/node_modules/ts-node/src/index.ts:1458:12)
    at Module.load (node:internal/modules/cjs/loader:981:32)