"LingQs" not responding!

I’ve just joined LIngQ but am not getting very far despite several attempts. When I mark a word in one of the texts and then click on the “LIngQ” button, I just get a message saying “Server error”. Can anyone offer enlightenment?

AEB - if you mark the word, is it blue or black?
It has to be blue - and the same the LingQ-button.

Which browser and version are you using?