Error code 28 means that there is "no space left on device" i.e., one or more partitions on your server is out of space or doesn't have enough space to complete the operation. My guess is that your vb_GAB_stats table is very large so the vb_GAB_temp_stats cannot be created because the server doesn't have enough space. You can either ask your host to give you more space, or you'll need to run these queries to delete the stats and start over as there isn't enough room to compress the stats:
Code:
# warning: deletes all statistics data !!!!
DROP TABLE IF EXISTS vb_GAB_temp_stats;
TRUNCATE TABLE vb_GAB_stats;