The app is not installed on this instance. error on postman when requesting for issues by issue id

[Faizan_Sayyed]

I am trying to get the issue with issue id. I have authorized in postman but while sending the request i am getting  following Error message 

{    "errorMessages": [        "The app is not installed on this instance."    ]}

[Dario B]

Hello @Faizan_Sayyed ,

Welcome to the Atlassian Community!

We don't have enough information to be able to help you.

Can you kindly let us know:

1. The endpoint you are calling (and the request method used)
2. How you authenticate the REST API call

Also, can you kindly run the same request using Curl and paste it in here, together with the results, making sure to remove the sensitive data like in below example:

curl -u <EMAIL-ADDRESS>:<API-TOKEN> -H 'Accept: application/json' -X GET "https://<NAME>.atlassian.net/rest/api/3/issue/10554"
 

{"expand":"renderedFields,names,schema,operations,editmeta,changelog,versionedRepresentations","id":"10554","self":"https://<NAME>.atlassian.net/rest/api/3/issue/10554","key":"TSP-26","fields":{"statuscategorychangedate":"2019-10-31T12:34:26.810+0100","issuetype":{"self":"https://<NAME>.atlassian.net/rest/api/3/issuetype/10100","id":"10100","description":"A user story. Created by JIRA Software - do not edit or delete.","iconUrl":"https://<NAME>.atlassian.net/secure/viewavatar?size=medium&avatarId=10315&avatarType=issuetype","name":"Story",.....

Cheers,
Dario