wifi is grey out

i was going to replace the lightning connector flex cable in my iphone 8 plus.

I follow the steps in the guide and finished step 64, but i had to stop. The next step is to remove the lightning connector flex cable. I then follow the guide and put everything back. After i put back everything and boot up the phone, the wifi will not turn on, it does not let me toggle. I have double checked the bottom antenna and the top antenna, all seems to look fine. Please, can you suggest where i could have forgot a connector.

thanks.