You could just call it manually.
It failed to download or failed to write it to the cache.db file. If you could repeat the error and post your console.log file that would be helpful.
umm i don't remember downloading BL r1395 but somehow i had this treasure chest while in my dedi server so i did a treasure hunt but my blockland crashed :(. (the dedicated loader)
I would love to see a brick coffin that opens when you click it only to have a skeleton pop out at you. Then the skeleton goes back in the coffin and the door shuts.
Go to baddy's server