Please help! Can't openvpn client connect via 3g modem?

Question

openvpn

Hello. Please help me figure it out.
There is: Comp_1 (openvpn server) --> Internet (White IP) --> 3G modem (SIM Rostelecom, SIM Iota) --> Comp_2 (openvpn client)
Problem: The client does not connect via mobile Internet.
Through Ethernet everything works stably. The server through the 3G modem does not ping, and the white ip from the provider gives pings.
Logs:
Server -->

Mon Jun 01 19:29:41 2020 NOTE: your local LAN uses the extremely common subnet address 192.168.0.x or 192.168.1.x.  Be aware that this might create routing conflicts if you connect to the VPN server from public locations such as internet cafes that use the same subnet.
Mon Jun 01 19:29:41 2020 Diffie-Hellman initialized with 2048 bit key
Mon Jun 01 19:29:41 2020 Outgoing Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Jun 01 19:29:41 2020 Incoming Control Channel Authentication: Using 160 bit message hash 'SHA1' for HMAC authentication
Mon Jun 01 19:29:41 2020 interactive service msg_channel=288
Mon Jun 01 19:29:41 2020 ROUTE_GATEWAY 192.168.1.1/255.255.255.0 I=12 HWADDR=74:2f:68:7a:2d:be
Mon Jun 01 19:29:41 2020 open_tun
Mon Jun 01 19:29:41 2020 TAP-WIN32 device [ServerVPN] opened: \\.\Global\{D1BF8C1D-7436-432E-9C21-952A028E348F}.tap
Mon Jun 01 19:29:41 2020 TAP-Windows Driver Version 9.24 
Mon Jun 01 19:29:41 2020 Notified TAP-Windows driver to set a DHCP IP/netmask of 10.10.10.1/255.255.255.252 on interface {D1BF8C1D-7436-432E-9C21-952A028E348F} [DHCP-serv: 10.10.10.2, lease-time: 31536000]
Mon Jun 01 19:29:41 2020 Sleeping for 5 seconds...
Mon Jun 01 19:29:46 2020 Successful ARP Flush on interface [24] {D1BF8C1D-7436-432E-9C21-952A028E348F}
Mon Jun 01 19:29:46 2020 MANAGEMENT: >STATE:1591021786,ASSIGN_IP,,10.10.10.1,,,,
Mon Jun 01 19:29:46 2020 MANAGEMENT: >STATE:1591021786,ADD_ROUTES,,,,,,
Mon Jun 01 19:29:46 2020 C:\Windows\system32\route.exe ADD 192.168.0.0 MASK 255.255.255.0 10.10.10.2
Mon Jun 01 19:29:46 2020 Route addition via service succeeded
Mon Jun 01 19:29:46 2020 C:\Windows\system32\route.exe ADD 10.10.10.0 MASK 255.255.255.0 10.10.10.2
Mon Jun 01 19:29:46 2020 Route addition via service succeeded
Mon Jun 01 19:29:46 2020 Socket Buffers: R=[8192->8192] S=[8192->8192]
Mon Jun 01 19:29:46 2020 Listening for incoming TCP connection on [AF_INET][undef]:12345
Mon Jun 01 19:29:46 2020 TCPv4_SERVER link local (bound): [AF_INET][undef]:12345
Mon Jun 01 19:29:46 2020 TCPv4_SERVER link remote: [AF_UNSPEC]
Mon Jun 01 19:29:46 2020 MULTI: multi_init called, r=256 v=256
Mon Jun 01 19:29:46 2020 IFCONFIG POOL: base=10.10.10.4 size=62, ipv6=0
Mon Jun 01 19:29:46 2020 MULTI: TCP INIT maxclients=60 maxevents=64
Mon Jun 01 19:29:46 2020 Initialization Sequence Completed
Mon Jun 01 19:29:46 2020 MANAGEMENT: >STATE:1591021786,CONNECTED,SUCCESS,10.10.10.1,,,,

Client -->

Mon Jun 01 19:44:45 2020 Restart pause, 5 second(s)
Mon Jun 01 19:44:50 2020 MANAGEMENT: CMD 'proxy HTTP 91.218.102.152 12345'
Mon Jun 01 19:44:51 2020 TCP/UDP: Preserving recently used remote address: [AF_INET]91.218.102.152:12345
Mon Jun 01 19:44:51 2020 Socket Buffers: R=[8192->8192] S=[8192->8192]
Mon Jun 01 19:44:51 2020 Attempting to establish TCP connection with [AF_INET]91.218.102.152:12345 [nonblock]
Mon Jun 01 19:44:51 2020 MANAGEMENT: >STATE:1591022691,TCP_CONNECT,,,,,,
Mon Jun 01 19:46:51 2020 TCP: connect to [AF_INET]91.218.102.152:12345 failed: Unknown error
Mon Jun 01 19:46:51 2020 SIGUSR1[connection failed(soft),init_instance] received, process restarting
Mon Jun 01 19:46:51 2020 MANAGEMENT: >STATE:1591022811,RECONNECTING,init_instance,,,,,
Mon Jun 01 19:46:51 2020 Restart pause, 10 second(s)
Mon Jun 01 19:47:01 2020 MANAGEMENT: CMD 'proxy HTTP 91.218.102.152 12345'
Mon Jun 01 19:47:02 2020 TCP/UDP: Preserving recently used remote address: [AF_INET]91.218.102.152:12345
Mon Jun 01 19:47:02 2020 Socket Buffers: R=[8192->8192] S=[8192->8192]
Mon Jun 01 19:47:02 2020 Attempting to establish TCP connection with [AF_INET]91.218.102.152:12345 [nonblock]
Mon Jun 01 19:47:02 2020 MANAGEMENT: >STATE:1591022822,TCP_CONNECT,,,,,,

So everything is on repeat. Please give advice where to dig. I did not find any information about this error on the Internet.