Looks like that did the trick!
If the file SoftAp0 is interfering constantly with Pihole, delete it and tell the system not to generate it again.
Delete it:
sudo rm /etc/dnsmasq.d/SoftAp0
And don't generate it again just commenting this line:
wfile="/etc/dnsmasq.d/SoftAp0"
inside this file:
/opt/scripts/boot/am335x_evm.sh
Thank you very much for your help. I really appreciate you experts helping. Thank you very much!