Bitmask VPN fails to connect with ipv6 disabled
After the Bimask VPN blocks most of the sites when assigned a public IPv6 address I disabled IPv6 on my laptop completely using this guide but after this I can't connect the VPN:
2017-10-31T02:31:03+0100 [twisted.internet.endpoints.OneShotFactory#info] Starting factory <twisted.internet.endpoints.OneShotFactory instance at 0x7fd00e58a290>
2017-10-31T02:31:04+0100 [stdout#info] >LOG:1509413464,I,[otter.demo.bitmask.net] Peer Connection Initiated with [AF_INET]46.165.242.169:443
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/events/poll HTTP/1.1" 200 53 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'starting', 'down': 'NA', 'remote': 'None:None', 'up': 'NA', 'error': None}
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/vpn/status HTTP/1.1" 200 303 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'starting', 'down': 'NA', 'remote': 'None:None', 'up': 'NA', 'error': None}
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/vpn/status HTTP/1.1" 200 303 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/events/poll HTTP/1.1" 200 53 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,W,Note: option tun-ipv6 is ignored because modern operating systems do not need special IPv6 tun handling anymore.
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,W,GDG6: NLSMG_ERROR: error -101
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,I,TUN/TAP device tun0 opened
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,D,do_ifconfig, tt->did_ifconfig_ipv6_setup=1
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,I,/sbin/ip link set dev tun0 up mtu 1500
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,I,/sbin/ip addr add dev tun0 10.42.0.18/21 broadcast 10.42.7.255
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,I,/sbin/ip -6 addr add 2001:db8:123::1010/64 dev tun0
2017-10-31T02:31:05+0100 [stdout#info] >LOG:1509413465,F,Linux ip -6 addr add failed: external program exited with error status: 2
2017-10-31T02:31:05+0100 [twisted.internet.endpoints.OneShotFactory#info] Stopping factory <twisted.internet.endpoints.OneShotFactory instance at 0x7fd00e58a290>
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'failed', 'error': 1}
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/vpn/status HTTP/1.1" 200 192 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'failed', 'error': 1}
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/vpn/status HTTP/1.1" 200 192 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/events/poll HTTP/1.1" 200 53 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'failed', 'error': 1}
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:04 +0000] "POST /API/vpn/status HTTP/1.1" 200 192 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'failed', 'error': 1}
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:05 +0000] "POST /API/vpn/status HTTP/1.1" 200 192 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:05 +0000] "POST /API/events/poll HTTP/1.1" 200 53 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'failed', 'error': 1}
2017-10-31T02:31:05+0100 [twisted.python.log#info] "127.0.0.1" - - [31/Oct/2017:01:31:05 +0000] "POST /API/vpn/status HTTP/1.1" 200 192 "http://localhost:7070/" "Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/538.1 (KHTML, like Gecko) Qt/5.9.1 Version/7.0 Safari/538.1"
2017-10-31T02:31:05+0100 [stdout#info] >>>STATUS {'status': 'failed', 'error': 1}
201