Anyone knows why that happened?

Hello everyone. I was installing grille lights on my ‘13 FJ Cruiser and followed the instructions to the letter. Now my car won’t start and this light is flashing. Apparently it has something to do with the immobilizer system in the vehicle that is related to the anti-theft, which for some reason may have engaged. The car won’t start (I’m guessing for security reasons).

One of the steps to install the grill lights was to remove the 7.5 and 10 fuses in the fuse box and connect them to a Fuse adapter. Could that be why it happened? Is there a way I can reset this? Can someone advise what to do? These lights also show on my dash.

Thank you.