Yes! eDice has option to add multiple eBay accounts. Here is the step by step to add multiple account - 

Step 1 - Seller already has a seller ebay account/store (list of stores are in "Your Store" pane, from left panel select Store>Add Store

Step 2 - Select add a new store

Step 3 - that will redirect to you to ebay login page, please enter correct credential and follow eBay steps -

Most common issue that we have identified in case of an 'error page', first try the following - 

1) Clear Browsing History

2) Delete Cookies

3) Close all the browser

4) Re-launch browser and try it again!