If you are referring to VMware Hands on Lab, unfortunately it is not available as of now.Bayu Wibowo | VCIX6-DCV/NV
Author of VMware NSX Cookbook http://bit.ly/NSXCookbook
https://nz.linkedin.com/in/bayupw | twitter @bayupw
There is a VMware Education class: VMware NSX: Troubleshooting and Operations [V6.2] which is a five-day hands-on training course provides you with the advanced knowledge, skills, and tools to achieve competence in operating and troubleshooting the VMware NSX® 6.2 environment. In this course, you will be presented with various types of technical problems. You will learn how to identify the problems and solve them through a systematic process. You will also learn about several operational, management, and troubleshooting tools.
There aren't any specific HOL labs just for troubleshooting. However, there are some elements of troubleshooting in a few HOL labs. Lastly, the best way to troubleshoot is to build a lab sandbox environment and do some break fix.
I'm not sure where you are located, but Mindsight offers demo labs in our office in Downers Grove, IL each Friday. Mindsight Demo Days is hosted by one of our solution architects and allows you to gain hands-on experience with a solution you're considering, or in your case needing to trouble shoot. Mindsight is a VMware premier solution provider and partner. Our highly certified engineers and solution architects have expert knowledge of VMware NSX. Hopefully this helps.