I get this error very often (while generating addresses, make transactions etc):

Also the block explorer doesn't work. I have a balance of 49753.80 EXO, but the block explorer just shows my last transaction.
My addresses:
EXOFNWN3qPUnErDbNst7MbfFu3KN1G4deKuTdabk
EXOz4nDUgD7fsCGds6f8hROQxgkUpCOEafb8dbcc
EXOXu1Fud22xGWWdBfCbZxO379EznZFKEQdfdabf
EXOBTtGXCshPqCrk9EOmD3CHCcObO5hBPKEbcmgh