problem after update CoursePress Pro

Good morning,
this morning after update CoursePress Pro I have found this on my site...

Warning: array_filter() expects parameter 1 to be array, boolean given in /home/dolcesen/public_html/corsidicucinanaturale/wp-content/plugins/coursepress/2.0/include/coursepress/data/class-student.php on line 2004

Someone can help me ?

thank you in advance