Lab 10, Task 1, step 4 the account to be used in the export command is vraadmin, not vra
This one was already a while ago by Eric Sloof too:
Lab 24, Task 3, step 1 login must be done with user RD-XaaS01 (one a in the name in the lab guide is an s)
Lab 25, Task 3, step 14 and 15 should be the other way around, first expand the Pre-Approval to verify it and then logout