Hi @Venezia,
Gathered from all the information and the picture it looks like you are dealing with a plant bug thrips. They can be hard to notice at first glance but as they are common houseplant and plant pests they will find a way into our homes eventually. These pests can come with fruits and vegetables from the grocery store or with any new houseplant. Thrips damage here is visible from the discolouration, pests are eating the surface cells of the leaf until the plant cells collapse, leaving small black spots there (droppings). I’d advise you not to consume the leaves anymore and reset your garden. Please find the instructions in the thread about thrips.
Also, please contact our Support who will help you with new plant pods. support@clickandgrow.com
The strawberry and basil dying can be associated with thrips too, but if you can elaborate on what happened or have any pictures of them please write about these here or to Support.