All my shares are rejected now! Anybody else?

[2019-03-09 20:38:04] Pool pool.supportxmr.com share rejected. (GPU2) Error code: -1 - Low difficulty share (a:141 r:6) (188 ms)
[2019-03-09 20:38:22] Stats Uptime: 0 days, 01:04:31
[2019-03-09 20:38:22] GPU 0 [59C, fan 87%] cnr: 2.311kh/s, avg 2.315kh/s, pool 2.235kh/s a:27 r:0 hw:0
[2019-03-09 20:38:22] GPU 1 [57C, fan 86%] cnr: 2.342kh/s, avg 2.336kh/s, pool 1.774kh/s a:23 r:1 hw:0
[2019-03-09 20:38:22] GPU 2 [55C, fan 86%] cnr: 2.306kh/s, avg 2.304kh/s, pool 1.845kh/s a:24 r:2 hw:0
[2019-03-09 20:38:22] GPU 3 [63C, fan 87%] cnr: 2.279kh/s, avg 2.279kh/s, pool 2.649kh/s a:32 r:1 hw:0
[2019-03-09 20:38:22] GPU 4 [54C, fan 88%] cnr: 2.274kh/s, avg 2.279kh/s, pool 2.888kh/s a:35 r:2 hw:1
[2019-03-09 20:38:22] Total cnr: 11.51kh/s, avg 11.51kh/s, pool 11.39kh/s a:141 r:6 hw:1
[2019-03-09 20:38:26] Pool pool.supportxmr.com received new job. (job_id: PnLU2XWpyX31dj7IhXHtUQHsgi5h)
[2019-03-09 20:38:26] Pool pool.supportxmr.com share rejected. (GPU3) Error code: -1 - Low difficulty share (a:141 r:7) (89 ms)
[2019-03-09 20:38:52] Pool pool.supportxmr.com received new job. (job_id: PRfxENISbIlmg3C0riLiIqM1Gf3/)
[2019-03-09 20:38:52] Pool pool.supportxmr.com share rejected. (GPU1) Error code: -1 - Low difficulty share (a:141 r: Cool

(114 ms)
[2019-03-09 20:38:52] Stats Uptime: 0 days, 01:05:01
[2019-03-09 20:38:52] GPU 0 [58C, fan 88%] cnr: 2.315kh/s, avg 2.315kh/s, pool 2.218kh/s a:27 r:0 hw:0
[2019-03-09 20:38:52] GPU 1 [57C, fan 85%] cnr: 2.335kh/s, avg 2.336kh/s, pool 1.760kh/s a:23 r:2 hw:0
[2019-03-09 20:38:52] GPU 2 [57C, fan 86%] cnr: 2.306kh/s, avg 2.304kh/s, pool 1.831kh/s a:24 r:2 hw:0
[2019-03-09 20:38:52] GPU 3 [62C, fan 87%] cnr: 2.279kh/s, avg 2.279kh/s, pool 2.629kh/s a:32 r:2 hw:0
[2019-03-09 20:38:52] GPU 4 [54C, fan 88%] cnr: 2.281kh/s, avg 2.279kh/s, pool 2.866kh/s a:35 r:2 hw:1
[2019-03-09 20:38:52] Total cnr: 11.52kh/s, avg 11.51kh/s, pool 11.30kh/s a:141 r:8 hw:1
[2019-03-09 20:39:03] Pool pool.supportxmr.com received new job. (job_id: 9c5hNr/H/mBkFQ6w5pbU+nSUk5Jv)
[2019-03-09 20:39:03] Pool pool.supportxmr.com share rejected. (GPU4) Error code: -1 - Low difficulty share (a:141 r:9) (93 ms)
[2019-03-09 20:39:12] Pool pool.supportxmr.com share rejected. (GPU0) Error code: -1 - IP Address currently banned for using an invalid mining protocol, please check your miner (a:141 r:10) (17 ms)

EDIT: was pool side problem, it is OK now. THX!