@Oney, Matthew T Apologies for the delayed response, As I understand you are running into deployment issues while deploying "Microsoft Sentinel Training Lab" from the content hub.
Tried deploying the same at my end, ran into similar issue, after reviewing the steps mentioned here - https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Training/Azure-Sentinel-Training-Lab/Modules/Module-1-Setting-up-the-environment.md#exercise-1-the-azure-sentinel-workspace was able to deploy it successfully, would request you to review the same and try to redeploy again.
If the issue still persists, let me know we can connect offline to troubleshoot further on the same.