Debugger cannot execute cast and vectorization commands

Hello. I am a novice in programming. I have a problem with the debugger.
My target CPU is Cortex-A72 Aarch64, FPU Armv8 (Neon). I use vectorization.
When the debugger reaches the line:
uint8x16_t aa = vmovq_n_u8 (0);
he writes that it is running, but nothing happens. Commands cannot be executed further.
Similarly, the debugger behaves when executed:
int a = 1;
double bb = (double) a;
He cannot complete the second line.
Tell me, please, why is this happening and how to solve it?

It looks like this: