Client broken on random time

Hello,

I got error

Jul 29 08:49:57 host urbackupclientbackend[1089]: terminate called after throwing an instance of ‘CryptoPP::OS_RNG_Err’
Jul 29 08:49:57 host urbackupclientbackend[1089]: what(): OS_Rng: open /dev/urandom operation failed with error 24

client
UrBackup Client Controller v2.3.4.0

client is stopping after this error