Failed to send authentication check?

At around 3:15-3:30am UTC+0 the server connection seemed to have issues, with delayed sends, Connection error, a small spinning circle in the top left and when I refreshed:

Something went wrong
An error occurred when trying to authenticate:

Failed to send authentication check.

Pings to wolfery.com failed. A traceroute got as far as BT’s remote gateway and timed out:

  1     3 ms     2 ms     2 ms  192.168.1.254
  2     4 ms     3 ms     3 ms  172.16.15.121
  3     *        *        *     Request timed out.
  4     4 ms     4 ms     6 ms  62.6.204.190
  5     6 ms     5 ms     5 ms  62.6.204.117
  6     5 ms    10 ms    14 ms  166-49-209-194.gia.bt.net [166.49.209.194]

So maybe this is a BT error or maybe something cut the cable (virtually via a netsplit or otherwise)? Edit: This resolved by 03:40:

Tracing route to wolfery.com [185.189.48.215]
over a maximum of 30 hops:

  1     3 ms     2 ms     1 ms  192.168.1.254
  2     3 ms     3 ms     2 ms  172.16.15.121
  3     *        *        *     Request timed out.
  4     6 ms     5 ms     5 ms  62.6.204.190
  5     *        8 ms     6 ms  62.6.204.117
  6     6 ms     5 ms     6 ms  166-49-209-194.gia.bt.net [166.49.209.194]
  7     *        *        *     Request timed out.
  8     *        *        *     Request timed out.
  9     *        *        *     Request timed out.
 10    35 ms    35 ms    37 ms  yelles-ab.e0-3.switch1.sto2.he.net [184.104.204.230]
 11    41 ms    41 ms    41 ms  s12.webeasy.se [185.189.48.215]

But hopefully server move soon! Less reliance on Hurricane Electric.