How many inventory slots does it take?!

I receive my Season reward box and, for whatever reason, got it delivered to my Inventory. (It's possible that this is because my game crashed or something, I don't really recall.)

But I have two Inventory slots free, and yet the box won't open. It contains 2 Epic Item Pieces, 10 Rare Item Pieces, and a bunch of Rare Parts and Cells. When I try to open it, I get this:

Why is this happening?

 

Well, I ended up buying 5 Inventory Slots for something else and it opened fine. So I guess it just needs a lot of space.

 

This has happened to me also, I believe you need 3 empty slots to open the box.

 

Also, thank you for adding all those unecessary tags and this awesome unecessary poll
(How do you know how to spell unecessary btw?)
(P.S. When will I recieve kudos? ακα κυδος)

 

I long for the days when inventory expansion was under 1k pearls.

 

The price for expanding inventory should never go above 1K pearls.
It should start low and max out at 1K pearls per level.
I scrap pretty much all teal items, since I have no room to store the items.
It's mind boggling how much money Rovio loses by putting up so many road blocks to game progression.

 

You already have. Check your profile.

 

Yikes, 1000 is a lot!

 

Scrap items you may not gonna use . uncommon even some rare .

 

The current system has an exponential increase in Pearl costs. For example it takes 1500 Pearls to get to 85 slots, and 3100 Pearls to get to 110 slots... It may sound like a lot of slots, but there are 41 unique items and the need for 6 dups of each item, one can easily foresee using hundreds of slots. The power cell wait forces you to inventory items, or scrap them and prey you get them back when you have cells. Hint: I've seen 12+ months pass without receiving a single copy of items I want, so plan for RNG to work against you with 41 items. Full inventories reduce purchases because it always means you are going to be forced to scrap items you want to keep... so why bother? Make inventory cheaper, and box/create purchases will likely go up.

 

I am not sure about which update but i was thinking to buy next 5 slots , which was costing 1000 pearls . i was trying to collect 1000 but when i reached 1000 pearls we had some update and then same 5 slot price increased to 1070 . then i decided not to buy it . i scrapped lots of items to make space .