Grin-miner shows error,please help me

I have two rtx2080ti cards, ubuntu server 18.04 OS, when run grin-miner, the shell show the error:

Thread ‘unnamed’ panicked with message:
“called Option::unwrap() on a None value”
See grin.log for further details.
Jan 17 06:29:13.792 ERRO
thread ‘unnamed’ panicked at ‘called Option::unwrap() on a None value’: libcore/option.rs:355stack backtrace:
0: 0x55682b0fa8fd - backtrace::backtrace::trace::h6a895d5d279a8d2f
1: 0x55682b0f9b12 - <backtrace::capture::Backtrace as core::default::Default>::default::h03a8d770395d927e
2: 0x55682b0f9b89 - backtrace::capture::Backtrace::new::h2eb1c11c92f206be
3: 0x55682b0ce6f0 - grin_miner_util::logger::send_panic_to_log::{{closure}}::h2af0d412bce13617
4: 0x55682b127216 - std::panicking::rust_panic_with_hook::hde420d6fd4455550
at libstd/panicking.rs:480
5: 0x55682b126d61 - std::panicking::continue_panic_fmt::h8f394f3c578bcc76
at libstd/panicking.rs:390
6: 0x55682b126c45 - rust_begin_unwind
at libstd/panicking.rs:325
7: 0x55682b16d90c - core::panicking::panic_fmt::hca5dc4e8b320bc56
at libcore/panicking.rs:77
8: 0x55682b16d83b - core::panicking::panic::hca17aeb7dac42859
at libcore/panicking.rs:52
9: 0x55682b0b29ea - cuckoo_miner::miner::miner::CuckooMiner::solver_thread::hb1fcc4a4bd01fca3
10: 0x55682b0bdaf3 - std::sys_common::backtrace::__rust_begin_short_backtrace::hcf79c3268d4dbfbf
11: 0x55682b0ba838 - std::panicking::try::do_call::h6ff9bd317a676021
12: 0x55682b1372a9 - __rust_maybe_catch_panic
at libpanic_unwind/lib.rs:102
13: 0x55682b0befad - <F as alloc::boxed::FnBox>::call_box::h94a600f864e1afe3
14: 0x55682b12466d - <alloc::boxed::Box<(dyn alloc::boxed::FnBox<A, Output=R> + 'a)> as core::ops::function::FnOnc
e
>::call_once::h9d902c911a417e39
at liballoc/boxed.rs:682
- std::sys_common::thread::start_thread::h44127e03e78ca137
at libstd/sys_common/thread.rs:24
15: 0x55682b115985 - std::sys::unix::thread::thread::new::thread_start::h8f17b97f2223146c
at libstd/sys/unix/thread.rs:90
16: 0x7f6e1a1276da - start_thread
17: 0x7f6e19c3888e - __clone
18: 0x0 -

after that, one rtx2080ti card work normal, another one not work. but two cards work well yesterday. please help me, thanks.