Since last night I have one machine that is unable to connect, but several others that seem to be fine.  One of the working machines has the same software and config as the one that isn't working, but all were working yesterday.

This is what I get:

[2018-04-23 09:54:15] : Fast-connecting to xmr.poolmining.org:3032 pool ...

[2018-04-23 09:54:16] : Pool xmr.poolmining.org:3032 connected. Logging in...

[2018-04-23 09:54:17] : Difficulty changed. Now: 7500.

[2018-04-23 09:54:17] : Pool logged in.

[2018-04-23 09:54:22] : SOCKET ERROR - [xmr.poolmining.org:3032] RECEIVE error: socket closed

[2018-04-23 09:54:22] : All pools are dead. Idling...

[2018-04-23 09:54:52] : Fast-connecting to xmr.poolmining.org:3032 pool ...

[2018-04-23 09:54:54] : Pool xmr.poolmining.org:3032 connected. Logging in...

[2018-04-23 09:54:56] : Pool logged in.

[2018-04-23 09:54:58] : SOCKET ERROR - [xmr.poolmining.org:3032] RECEIVE error: socket closed

[2018-04-23 09:54:58] : All pools are dead. Idling...

[2018-04-23 09:55:28] : Fast-connecting to xmr.poolmining.org:3032 pool ...

[2018-04-23 09:55:28] : SOCKET ERROR - [xmr.poolmining.org:3032] CONNECT error: Connection refused

[2018-04-23 09:55:58] : Fast-connecting to xmr.poolmining.org:3032 pool ...

[2018-04-23 09:55:58] : Pool xmr.poolmining.org:3032 connected. Logging in...

[2018-04-23 09:55:58] : SOCKET ERROR - [xmr.poolmining.org:3032] Login error: No active block template

[2018-04-23 09:55:58] : SOCKET ERROR - [xmr.poolmining.org:3032] RECEIVE error: Bad file descriptor

Any ideas?  Could this be related to the upgrade?  Thanks!

I have the same problem.  I get nothing for my stats page anymore, and I confirmed I have not been paid out (amount isn't high enough yet).

If I enable Firefox developer tools, I see that this error occurred:

XML Parsing Error: no root element found
Location: https://poolmining.org/api/pool/xmr1/miner/4AMZRxvBjkRgUTFmL7SF6RTXGxPtA8xPm2opLR1yMuiCJu8ozV45GEjHALWQFoi4YxNwRZNHZrxQxBB9Xwqw5pHaUcBYWU9/stats

If I make up a wallet address (delete a few chars from that url), I get this response:

{"result":{"pendingShares":0,"pendingBalance":0.0,"totalPaid":0.0,"lastPayment":null,"lastPaymentLink":null,"performance":null},"success":true,"responseMessageType":0,"responseMessageId":null,"responseMessageArgs":null}

So it seems the API is sending back a blank response for my wallet, but not for invalid wallets.