I bought them at the Maker Faire in NY and I had no trouble setting them up.  But about two weeks ago they both stopped working.

Here is the message:


 ST:2  F:0  NB:1  AS:0  BW:[ 26/  4 B/s]  E:0.00  BS:0
 0            |   0.0/  0.0/  0.0 h/s | A:0 R:0+0(none) HW:0/none
------------------------------------------------------------------------------------------------------------------------
NO DEVICES FOUND: Press 'M' and '+' to add
------------------------------------------------------------------------------------------------------------------------
 [2018-10-22 14:26:14] Waiting for devices; press 'M+' to add, or 'Q' to quit
 [2018-10-22 14:26:14] Probing for an alive pool
 [2018-10-22 14:26:19] Pool 0 stratum+tcp://us.litecoinpool.org:3333 alive
 [2018-10-22 14:26:19] Pool 0 is hiding block contents from us
 [2018-10-22 14:26:19] Network difficulty changed to 8.88M (63.60Th)
 [2018-10-22 14:26:19] Stratum from pool 0 detected new block


Note the message: Pool 0 is hiding block contents from us


What is going on?