Not able to grow spinach | New Gardeners | Commercial Hydroponics farming in India

Hello,
I have recently started terrace gardening. Trying with spinach,, but I am surprised about what's going wrong!!!!
Got the soil bed , seeds and growing material at garden guru outlet in bannerghatta. Tried twice putting seeds of spinach,, but none of the seed sprouted!!!

I have been growing veggies in my garden downstairs(around our house). Grown spinach umpteen number of times. But fail to know the reason behind the failure on the terrace......!

I notice lot of red ants in the pots.... Is that the reason...?

Do red ants eat spinach seeds. I could grow methi, beans and mooli but not spinach why......?