There was a problem loading us_population_1900_1999.txt in lab_population_of_us.sagews.
Error: ENOTDIR: not a directory, lstat '/storage/shares/default/project-578ca849-8aff-4a03-8cc8-0e985f103ac3/lab_population_of_us.sagews/us_population_1900_1999.txt'
Error: ENOTDIR: not a directory, lstat '/storage/shares/default/project-578ca849-8aff-4a03-8cc8-0e985f103ac3/lab_population_of_us.sagews/us_population_1900_1999.txt'