[Bug]How to open page of java course?

Question

When i enter course java , the first page of any lesson opens, and other are not,what

Answer 1

You have unlock next lesson by completing current lesson..
If it is not the solution then write to sololearn by mailto : [e-mail] with sufficient screen shot details...

Answer 2

I unlocked,when i click continue it just turns white screen and don't load at all,i wrote to that email,but thx