Helium (HNT) wallet auto-sync (502 Bad Gateway)

Describe the problem:
“Helium (HNT)” wallet cannot successfully auto-sync. It always ends with: “api returned 502 bad gateway (502), try again later”

Which exchange/wallet is this regarding?
Helium (HNT)

How did you import data into this wallet?
Auto-Sync

What have you tried to fix this so far?
Manual import was working fine, but not really helping here since I would like to make use of the auto-sync. On explorer.helium.com, the API works fine and I can see all activity from my wallet.

How are you getting a csv for manual importing?

Helium took down the API briefly yesterday, but this issue seems to be occurring both before and after.

I get the following error also

503] 503 Service Temporarily Unavailable nginx