roary core genome alignment file is empty.

Good morning,
I run roary for 59 genomes, I got 600 core genes, but the alignment file is empty.
can someone please help me understand why, I ran roary two times and I got the same result.
thank you

for update, I rerun with roary tool in galaxy europe, and got the same result empty file for alignment, I check my gff files no problem with them, if some can guide me what to do I will be grateful.