If an issue tracker in Dynatrace has no query results, what should you check first?

When an issue tracker in Dynatrace has no query results, the first aspect to check is the target URL and the provided credentials. This is crucial because if the target URL is incorrect or if the credentials used to access it are wrong, the query won’t retrieve any data. The essence of any data retrieval process hinges on the accuracy of the endpoint being queried and the authentication required to access that data. Therefore, validating these elements ensures that you are actually querying the correct source and have the necessary permissions to access the data. If either the URL or the credentials are incorrect, no results will be returned, thereby making it essential to confirm these details first in the troubleshooting process.