when i download sdk pakages then after finish it shows two errors.

1-Download finished with wrong size. Expected 90245472 bytes, got 54106132 bytes.

2-Download finished with wrong checksum. Expected 1357f66cb935fc6ae31ba656024a81fe787349c9, got           54a9ee4a067aaa03a6703e0e46d64b62e68ed994.