AD9371 JESD204B PRBS check status

Hello
I am using AD9371 Non OS codes (2019_r1 version and HDL also same version)
Xiiinx board : KCU116.
I am checking JESD behaviour.
We tried to check the "DeFramer PRBS".
For this checking, following code is added to Non-OS "headless.c" file.
uint32_t prbsErrorCount0;
uint32_t prbsErrorCount1;
uint32_t prbsErrorCount2;
uint32_t prbsErrorCount3;
/* PRBS check */
printf("PRBS check start...\n");
MYKONOS_clearDeframerPrbsCounters(&mykDevice);
MYKONOS_readDeframerPrbsCounters(&mykDevice,0,&prbsErrorCount0);
printf("PRBS error counter count(Before start) Lane0: %d\n",prbsErrorCount0);
MYKONOS_readDeframerPrbsCounters(&mykDevice,1,&prbsErrorCount1);
printf("PRBS error counter count(Before start) Lane1: %d\n",prbsErrorCount1);
MYKONOS_readDeframerPrbsCounters(&mykDevice,2,&prbsErrorCount2);
printf("PRBS error counter count(Before start) Lane2: %d\n",prbsErrorCount2);
MYKONOS_readDeframerPrbsCounters(&mykDevice,3,&prbsErrorCount3);
printf("PRBS error counter count(Before start) Lane3: %d\n",prbsErrorCount3);
MYKONOS_enableDeframerPrbsChecker(&mykDevice,15,MYK_PRBS7,1);
MYKONOS_readDeframerPrbsCounters(&mykDevice,0,&prbsErrorCount0);
printf("PRBS error counter count(After check) Lane0: %d\n",prbsErrorCount0);
MYKONOS_readDeframerPrbsCounters(&mykDevice,1,&prbsErrorCount1);
printf("PRBS error counter count(After check) Lane1: %d\n",prbsErrorCount1);
MYKONOS_readDeframerPrbsCounters(&mykDevice,2,&prbsErrorCount2);
printf("PRBS error counter count(After check) Lane2: %d\n",prbsErrorCount2);
MYKONOS_readDeframerPrbsCounters(&mykDevice,3,&prbsErrorCount3);
printf("PRBS error counter count(After check) Lane3: %d\n",prbsErrorCount3);
MYKONOS_enableDeframerPrbsChecker(&mykDevice,15,MYK_PRBS7,0);
printf("PRBS check end...\n");
As the result, following log is appeared at Tera Term log.
PRBS check start...
PRBS error counter count(Before start) Lane0: 0
PRBS error counter count(Before start) Lane1: 0
PRBS error counter count(Before start) Lane2: 0
PRBS error counter count(Before start) Lane3: 0
PRBS error counter count(After check) Lane0: 93732
PRBS error counter count(After check) Lane1: 13353520
PRBS error counter count(After check) Lane2: 16777215
PRBS error counter count(After check) Lane3: 16777215
PRBS check end...
At first, is our added code correct for Deframer PRBS check?
When it is correct, is there a cause and solution for this "DeFramer PRBS" error?

Any help would be very useful
Thank you
Regards
Pavan