Hola, teniamos el problema de que no aparecen las tareas y lo hemos solucionado consultando el siguiente foro:
En él, Claudia Palazzi dice:
I updated yesterday to the weekly update 1.9.10 and had the same problem. Logging in as student I could see the file, but not as teacher.
Only teachers were appearing in the list of uploads. Looking at the graded roles, in Site Administration, Grades, general Settings, only administrators and teachers were checked. I have unchecked those, and checked Students, and everything is appearing now.
La cuestion es que lo solucionamos como dice Claudia :
