Integration tokens

One of our clients is receiving a problem. When he creates an integration with Wazzup. it shows these errors: ,https://cdn.discordapp.com/attachments/608316826555908143/1138014514391027722/image.png
https://cdn.discordapp.com/attachments/608316826555908143/1138014660835164231/CR2TXUgAAAABJRU5ErkJggg.png
Our devs confirmed that the reason behind this is the incorrect token.
When creating the integration, we make a POST query on the https://oauth.pipedrive.com/oauth/token address, by using these params:

“grant_type”: “refresh_token”,
“refresh_token”: “8039656:12332587:fa6471de2ca6122b33c34abfff3a363cf9ec6b88”

But Pipedrive answers with:
“error”: {
“error”: {
“success”: false,
“message”: “Invalid grant: refresh token is invalid”,
“error”: “invalid_grant”
},
“statusCode”: 400
},
Could you please check, why do we receive an error about invalid token if it’s the one generated from you?
The time error is (gmt +0) “time”: {“$date”: “2023-08-04T06:40:17.000Z”}

The integration domain that experiences this problem is https://artistickitchendesign.pipedrive.com

My test account (https://compania3.pipedrive.com/) has the same problem if that helps you:

[
{
“_id”: {“$oid”: “64cb7be7f521940011874a0e”},
“_ctx”: {
“crmId”: “8939399b-10e6-4190-86d3-05c012483104”
},
“authorizeData”: {
“grant_type”: “refresh_token”,
“refresh_token”: “11367413:15582401:86f60722da7af51f31f888bdb4a0e2558ac6e24d”
},
“domain”: “https://compania3.pipedrive.com”,
“error”: {
“error”: {
“success”: false,
“message”: “Invalid grant: refresh token is invalid”,
“error”: “invalid_grant”
},
“statusCode”: 400
},
“handler”: “authorize”,
“level”: “error”,
“message”: “Unknown error”,
“module”: “pipedrive”,
“time”: {“$date”: “2023-08-03T10:05:26.000Z”}
}
]