OpenVPN certificate error? - SOLVED

I enabled openVPN as described in tutorial, but i recived this error from client …

I made factory default and everything again …

Thu Mar 23 16:31:38 2017 OpenVPN 2.3.13 x86_64-w64-mingw32 [SSL (OpenSSL)] [LZO] [PKCS11] [IPv6] built on Nov 3 2016
Thu Mar 23 16:31:38 2017 Windows version 6.2 (Windows 8 or greater) 64bit
Thu Mar 23 16:31:38 2017 library versions: OpenSSL 1.0.1u 22 Sep 2016, LZO 2.09
Enter Management Password:
Thu Mar 23 16:31:38 2017 MANAGEMENT: TCP Socket listening on [AF_INET]127.0.0.1:25343
Thu Mar 23 16:31:38 2017 Need hold release from management interface, waiting…
Thu Mar 23 16:31:38 2017 MANAGEMENT: Client connected from [AF_INET]127.0.0.1:25343
Thu Mar 23 16:31:38 2017 MANAGEMENT: CMD 'state on’
Thu Mar 23 16:31:38 2017 MANAGEMENT: CMD 'log all on’
Thu Mar 23 16:31:38 2017 MANAGEMENT: CMD 'hold off’
Thu Mar 23 16:31:38 2017 MANAGEMENT: CMD 'hold release’
Thu Mar 23 16:31:39 2017 Socket Buffers: R=[65536->65536] S=[65536->65536]
Thu Mar 23 16:31:39 2017 MANAGEMENT: >STATE:1490283099,RESOLVE,
Thu Mar 23 16:31:39 2017 UDPv4 link local: [undef]
Thu Mar 23 16:31:39 2017 UDPv4 link remote: [AF_INET]xxx.xxx.xxx.xxx:1194
Thu Mar 23 16:31:39 2017 MANAGEMENT: >STATE:1490283099,WAIT,
Thu Mar 23 16:31:39 2017 MANAGEMENT: >STATE:1490283099,AUTH,
Thu Mar 23 16:31:39 2017 TLS: Initial packet from [AF_INET]xxx.xxx.xxx.xxx:1194, sid=6bdd6e8b d6e34994
Thu Mar 23 16:31:40 2017 VERIFY ERROR: depth=1, error=unable to get local issuer certificate: C=US, O=Let’s Encrypt, CN=Let’s Encrypt Authority X3
Thu Mar 23 16:31:40 2017 OpenSSL: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed
Thu Mar 23 16:31:40 2017 TLS_ERROR: BIO read tls_read_plaintext error
Thu Mar 23 16:31:40 2017 TLS Error: TLS object -> incoming plaintext read error
Thu Mar 23 16:31:40 2017 TLS Error: TLS handshake failed
Thu Mar 23 16:31:40 2017 SIGUSR1[soft,tls-error] received, process restarting
Thu Mar 23 16:31:40 2017 MANAGEMENT: >STATE:1490283100,RECONNECTING,tls-error,
Thu Mar 23 16:31:40 2017 Restart pause, 2 second(s)