running PouchDB.load, TypeError: object is not a function TypeError: object is not a function at PouchDB

this.local = new PouchDB(this.dbName, {auto_compaction: true, adapter: 'websql'});
This error occurs while running this code, "
this.local.load('couchdb/calibers.txt' , {
proxy: this.remote.name,
ajax: {
cache: true
}})
.then((result) => {
console.log(result);
})
.catch((err)=>{
console.log(err);
})"

im using this pouchdb versions.
"pouchdb": "~6.3.4",
"pouchdb-adapter-memory": "^6.2.0",
"pouchdb-adapter-websql-core": "6.2.0",
"pouchdb-browser": "6.2.0",
"pouchdb-find": "^6.3.4",
"pouchdb-load": "^1.4.6",
"pouchdb-upsert": "^2.2.0",

any solution for this?