Deno, rpc staking.validators error: API-WS: disconnected from wss://rpc.polkadot.io: 1000:: Normal Closure

I encontered an error when trying to call polkadot and kusama rpc.

the code:

        const validators = await api.query.staking.validators.entries<
          ValidatorPrefs,
          [AccountId]
        >();

the error polkadot:

2023-07-17           API-WS: disconnected from wss://rpc.polkadot.io: 1000:: Normal Closure
2023-07-17           RPC-CORE: queryStorageAt(keys: Vec<StorageKey>, at?: BlockHash): Vec<StorageChangeSet>:: disconnected from wss://rpc.polkadot.io: 1000:: Normal Closure
2023-07-17           RPC-CORE: queryStorageAt(keys: Vec<StorageKey>, at?: BlockHash): Vec<StorageChangeSet>:: disconnected from wss://rpc.polkadot.io: 1000:: Normal Closure
An error occurred: Error: disconnected from wss://rpc.polkadot.io: 1000:: Normal Closure
    at WebSocket.#onSocketClose (https://deno.land/x/polkadot@0.2.41/rpc-provider/ws/index.ts:431:19)
    at WebSocket.wrappedHandler (ext:deno_web/02_event.js:1426:12)
    at innerInvokeEventListeners (ext:deno_web/02_event.js:792:7)
    at invokeEventListeners (ext:deno_web/02_event.js:839:5)
    at dispatch (ext:deno_web/02_event.js:696:9)
    at WebSocket.dispatchEvent (ext:deno_web/02_event.js:1101:12)
    at WebSocket.[[[eventLoop]]] (ext:deno_websocket/01_websocket.js:492:16)
    at eventLoopTick (ext:core/01_core.js:183:11)

the error kusama:

2023-07-17    API-WS: disconnected from wss://kusama-rpc.polkadot.io: 1000:: Normal Closure
2023-07-17    RPC-CORE: queryStorageAt(keys: Vec<StorageKey>, at?: BlockHash): Vec<StorageChangeSet>:: disconnected from wss://kusama-rpc.polkadot.io: 1000:: Normal Closure
at?: BlockHash): Vec<StorageChangeSet>:: disconnected from wss://kusama-rpc.polkadot.io: 1000:: Normal Closure
2023-07-17    
![Screenshot from 2023-07-17 14-56-34](https://github.com/polkadot-js/api/assets/19766243/d32ab75b-f883-4130-88b0-bf2647d1cec9)
![Screenshot from 2023-07-17 14-56-53](https://github.com/polkadot-js/api/assets/19766243/68565905-c934-4e08-9f9e-1db1d0eea0b1)
 RPC-CORE: queryStorageAt(keys: Vec<StorageKey>, at?: BlockHash): Vec<StorageChangeSet>:: disconnected from wss://kusama-rpc.polkadot.io: 1000:: Normal Closure
An error occurred: Error: disconnected from wss://kusama-rpc.polkadot.io: 1000:: Normal Closure
    at WebSocket.#onSocketClose (https://deno.land/x/polkadot@0.2.41/rpc-provider/ws/index.ts:431:19)
    at WebSocket.wrappedHandler (ext:deno_web/02_event.js:1426:12)
    at innerInvokeEventListeners (ext:deno_web/02_event.js:792:7)
    at invokeEventListeners (ext:deno_web/02_event.js:839:5)
    at dispatch (ext:deno_web/02_event.js:696:9)
    at WebSocket.dispatchEvent (ext:deno_web/02_event.js:1101:12)
    at WebSocket.[[[eventLoop]]] (ext:deno_websocket/01_websocket.js:492:16)
    at eventLoopTick (ext:core/01_core.js:183:11)

It's same for both, kusama and polkadot api. And it worked before, but the error appeared approximately 2-3 weeks ago. Also, the query works at https://polkadot.js.org/apps/#/chainstate

I would be thankful for any thoughts or help.

PS: My guess is that , since I am using Deno, the error is related to the versions:

build-deno.land version 0.2.41, release June 12
polkadot v0.9.43, released Jun 13
@polkadot-js/api v10.9.1 Jun 12.
polkadot-js/api/packages/api/package.json: "version": "10.9.2-6-x"

polkadot-js / api

Deno, rpc staking.validators error: API-WS: disconnected from wss://rpc.polkadot.io: 1000:: Normal Closure #5693