My Ether Wallet (MEW) advises against viewing your wallet on their platform as this process requires you to enter your private wallet key. Per their explanation, if their site was hacked, your private wallet key and all funds in that wallet could be compromised.
To avoid this, they advise using a service like Meta Mask to enter your private wallet key. You can find more info on Meta Mask by visiting https://metamask.io. There is an informative video on their page that helps break down the process and corresponding directions from My Ether Wallet available after selecting 'Meta Mask'.
If you are still having trouble accessing your wallet address, we advise checking out My Ether Wallet and Meta Mask's support sections. Please feel free to contact us at email@example.com if you have any further questions on this process.