Crash issue on Legacy realm sdk

Hi Team,

We are using Legacy Realm SDK v4.4.1 and experiencing a crash issues. please find below crash log.
libsystem_kernel.dylib

__pthread_kill + 8

libsystem_c.dylib

abort + 124

Realm

please_report_this_error_to_help_at_realm_dot_io + 12

Realm

realm::util::terminate_internal(std::__1::basic_stringstream<char, std::__1::char_traits, std::__1::allocator >&) + 264

Realm

realm::util::terminate(char const*, char const*, long, std::initializer_listrealm::util::Printable&&) + 324

Realm

realm::util::network::Service::BasicStreamOpsrealm::util::network::ssl::Stream::BufferedReadOperBase::advance() + 312

Realm

realm::util::network::Service::IoReactor::advance_active_ops(realm::util::network::Service::OperQueuerealm::util::network::Service::AsyncOper&) + 140

Realm

realm::util::network::Service::IoReactor::wait_and_advance(std::__1::chrono::time_point<std::__1::chrono::steady_clock, std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000000l> > >, std::__1::chrono::time_point<std::__1::chrono::steady_clock, std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000000l> > >, bool&, realm::util::network::Service::OperQueuerealm::util::network::Service::AsyncOper&) + 68

Realm

realm::util::network::Service::Impl::run() + 276

Realm

realm::sync::Client::run() + 36

Realm

realm::_impl::SyncClient::SyncClient(std::__1::unique_ptr<realm::util::Logger, std::__1::default_deleterealm::util::Logger >, realm::SyncClientConfig const&)::‘lambda0’()::operator()() const + 32

Realm

void* std::__1::__thread_proxy<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_deletestd::__1::__thread_struct >, realm::_impl::SyncClient::SyncClient(std::__1::unique_ptr<realm::util::Logger, std::__1::default_deleterealm::util::Logger >, realm::SyncClientConfig const&)::‘lambda0’()> >(void*) + 44

libsystem_pthread.dylib

_pthread_start + 320

Can you please add your thoughts on identifying root cause for the reported crash issue.

Thanks,
Seshu