Did you ever find a solution? I'm having a similar problem. My log doesn't seem to have a specific error so I'm a little lost.
Using OpenVPN provider: PROXPN
Supplied config US Seattle.ovpn could not be found.
Using default OpenVPN gateway for provider proxpn
Setting OPENVPN credentials...
adding route to local network 192.168.1.0/24 via 172.17.0.1 dev eth0
Thu Mar 14 04:35:51 2019 us=492872 WARNING: --keysize is DEPRECATED and will be removed in OpenVPN 2.6
Thu Mar 14 04:35:51 2019 us=492939 WARNING: --keysize is DEPRECATED and will be removed in OpenVPN 2.6
Thu Mar 14 04:35:51 2019 us=492948 WARNING: --keysize is DEPRECATED and will be removed in OpenVPN 2.6
Thu Mar 14 04:35:51 2019 us=493143 Current Parameter Settings:
Thu Mar 14 04:35:51 2019 us=493159 config = '/etc/openvpn/proxpn/default.ovpn'
Thu Mar 14 04:35:51 2019 us=493169 mode = 0
Thu Mar 14 04:35:51 2019 us=493177 persist_config = DISABLED
Thu Mar 14 04:35:51 2019 us=493184 persist_mode = 1
Thu Mar 14 04:35:51 2019 us=493190 NOTE: --mute triggered...
Thu Mar 14 04:35:51 2019 us=493213 326 variation(s) on previous 5 message(s) suppressed by --mute
Thu Mar 14 04:35:51 2019 us=493221 OpenVPN 2.4.7 x86_64-pc-linux-gnu [SSL (OpenSSL)] [LZO] [LZ4] [EPOLL] [PKCS11] [MH/PKTINFO] [AEAD] built on Feb 19 2019
Thu Mar 14 04:35:51 2019 us=493235 library versions: OpenSSL 1.0.2g 1 Mar 2016, LZO 2.08
Thu Mar 14 04:35:51 2019 us=493759 WARNING: No server certificate verification method has been enabled. See http://openvpn.net/howto.html#mitm for more info.
Thu Mar 14 04:35:51 2019 us=493769 NOTE: the current --script-security setting may allow this configuration to call user-defined scripts
Thu Mar 14 04:35:51 2019 us=494322 LZO compression initializing
Thu Mar 14 04:35:51 2019 us=494393 Control Channel MTU parms [ L:1622 D:1212 EF:38 EB:0 ET:0 EL:3 ]
Thu Mar 14 04:35:51 2019 us=494436 Data Channel MTU parms [ L:1622 D:1450 EF:122 EB:406 ET:0 EL:3 ]
Thu Mar 14 04:35:51 2019 us=494464 Local Options String (VER=V4): 'V4,dev-type tun,link-mtu 1542,tun-mtu 1500,proto UDPv4,comp-lzo,cipher BF-CBC,auth SHA1,keysize 512,key-method 2,tls-client'
Thu Mar 14 04:35:51 2019 us=494471 Expected Remote Options String (VER=V4): 'V4,dev-type tun,link-mtu 1542,tun-mtu 1500,proto UDPv4,comp-lzo,cipher BF-CBC,auth SHA1,keysize512,key-method 2,tls-server'
Thu Mar 14 04:35:51 2019 us=494481 TCP/UDP: Preserving recently used remote address: [AF_INET]50.7.88.172:443
Thu Mar 14 04:35:51 2019 us=494509 Socket Buffers: R=[212992->212992] S=[212992->212992]
Thu Mar 14 04:35:51 2019 us=494518 UDP link local: (not bound)
Thu Mar 14 04:35:51 2019 us=494525 UDP link remote: [AF_INET]50.7.88.172:443