Verify that directories are correct and that you copy the files in "/wallets/neutron/". And check if zip file is corrupted.
Neutron version v2.0.1.0-unk (May 7 2018, 06:04:27)
Using OpenSSL version OpenSSL 1.0.2j-fips 26 Sep 2016
Startup time: 05/17/18 13:06:45
Default data directory /root/.neutron
Used data directory /wallets/neutron/
Neutron server starting
/wallets/neutron/ - its my disk in memory
bit:/wallets/neutron # pwd
/wallets/neutron
bit:/wallets/neutron # ls -la
total 15936
drwxr-xr-x 4 root root 200 May 17 16:06 .
drwxrwxrwt 7 root root 160 May 17 17:40 ..
-rw------- 1 root root 0 Dec 19 00:10 .lock
-rw------- 1 root root 8192 May 9 13:59 blk0001.dat
drwx------ 2 root root 60 May 6 10:23 database
-rw------- 1 root root 210 May 17 16:06 db.log
-rw------- 1 root root 1106 May 17 16:06 peers.dat
drwx------ 2 root root 6460 May 7 21:03 txleveldb
-rw-r--r-- 1 root root 8019968 Mar 3 21:24 wallet.dat.123
-rw-r--r-- 1 root root 8282112 Jan 20 13:03 wallet.dat.last
bit:/wallets/neutron #