Student Course Page is not showing

I have enroll the student in the course but when i sign in and open the course it is showing

There was an error loading this course 

please help me to get resolve it

Hi,

Check if the course is shown in the catalog you have it in none, if so change it to about

Since this error happened to me when I had the courses like this, plus the option of only by invitation

Thanks it is working fine.