2018-Jan-31 19:06:29.775487 ERROR [node_server] [54.37.94.169:24181 OUT] Failed to invoke COMMAND_HANDSHAKE, closing connection.
2018-Jan-31 19:06:29.850491 ERROR [node_server] [54.37.94.170:24181 OUT] Failed to invoke COMMAND_HANDSHAKE, closing connection.
2018-Jan-31 19:06:29.926496 ERROR [node_server] [54.37.94.169:24181 OUT] Failed to invoke COMMAND_HANDSHAKE, closing connection.
2018-Jan-31 19:06:29.927496 ERROR [node_server] Failed to connect to any of seed peers, continuing without seeds
Dev, how to solve this problem with wallet??
What exactly are you trying to do? I need more information in general in order to help you.
I would guess you are having trouble connecting to seed peers. Perhaps it's a firewall issue?
in fact I downloaded the wrong version of the wallet from your website, and as it didn't worked I installed Offline wallet version

the problem come from that I think..
If I delete everything to install wallet one more time, I will refound my first address (with mnemonic seed)?
Yes, you should be able to use the mnemonic seed. Perhaps out of caution I would recommend you keep a backup of anything you delete, just in case.
My workday is complete, so I will take my leave for today. Thank you all for your interest.