When you say training modules do you mean the training data files or access to Anaplan in general.
In order to complete Level 1 you'll need access to an Anaplan Tenant. If you don't have access to one you can apply for a 90 day trial (free). If it's the files you can't download, then try using Chrome Incoginito or Microsoft Edge. There's an issue with Chrome native with people that are using the 90-day trial Tenant.
Get Setup with Anaplan.
Request a Free 90 Day Trial. You must have an Anaplan workspace in order to practice and to work through the training.
If you can't get a 90 day trial, then work with me to get set up somewhere else.
Once you get confirmation of your workspace, go ahead and change your password.
This will be your login to Anaplan from now on. You can log in from the main website www.anaplan.com
While you are waiting for your workspace, watch this YouTube video by Simon Tucker Chief Planning officer at Anaplan to get an Anaplan primer. 4 minutes.
Did you try Chrome incognito or Microsoft Edge? If so, then this is probably out of my line of expertise. You'll need to send a note to firstname.lastname@example.org copy your error message and explain you can't get to the L1 Training Course from your location (specify where you are located). Also note the browser you are using.
The first thing you'll be asked to do is clear your cache, so you might also mention you've tried that too.