Bonjour François, there may be a couple of issues to address. The first is the adblockplus.org list contains things other than domain names, so it's not possible to use in its current form. We are a domain blocker, so extra things like html elements on that list are going to cause problems. How to add lists to the Pi-hole should give you some hints on how to add lists.
As for Google accounts, follow the directions here to help you find out if you need to add some domains to the whitelist in order for you to access the sites you need. I think clearing out the easylist and resetting the Pi-hole will get you back to where you need to be.
Merci!