If you're stuck and can't progress within a certification training lab, we highly recommend you review the associated lab solution lesson. These can be found directly after the certification lesson that informs you to launch and complete a lab.
Lab solution lessons provide a step-by-step walkthrough of how to complete the lab, so they're the best place to get the support you need.
You can also post your questions on our course forum, found under the "Discussions" tab on the eLearning certification page. 
Also, consider joining our Discord community to explore dedicated channels, like the BTL1 Discussion, seek assistance from other students who may be able to help. (To join click here)
If you believe there is an technical error or lab deployment issue, please raise a support ticket and our technical support will be happy to look into this for you!