How can I fix error code E1?

My first real problem is how to open the device?

I have removed the 7 visible screws, but the plastic shell still doesn't come apart.

What else is needed to get inside this dehumidifier.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0