The status "Late upload" indicates that the Agent has not uploaded data to the platform for over 2 hours.  Here are some reasons why this status appears: 

• The Agent was stopped.
• The Agent was uninstalled.
• The Agent crashed (low-likelihood scenario).
• There was a period of network disconnection.

To diagnose the situation,

For Linux Agent:

check the log file at /opt/cht_perfmon/cht_perfmon_collector.output.

In addition, check the output of this command:

ls -l /var/lib/chtcollectd/*

For more details follow the below Help document:

https://docs.vmware.com/en/VMware-Tanzu-CloudHealth/SaaS/using-and-managing-vmware-tanzu-cloudhealth/GUID-integrating-with-VMware-services.html#troubleshoot-errors-11

For Windows Agent:

Follow the below KB article to generate the diagnostic information.

https://support.cloudhealthtech.com/hc/en-us/articles/4404658738701