Error codes or messages that indicate the specific nature of the installation failure When diagnosing an installation failure in Tableau Server, it is crucial to look for error codes or messages within the installation logs. These codes or messages can provide specific insights into what went wrong during the installation process, enabling targeted troubleshooting and resolution of the issue. Option A is incorrect because user access levels and permissions, while important, are not typically the primary focus when diagnosing an installation failure from the logs. Option B is incorrect as network bandwidth and latency are less likely to be detailed in installation logs and are not usually the primary causes of installation failures. Option D is incorrect because the number of users accessing the server during installation is unlikely to be a factor in installation failures and is not typically recorded in installation logs.