I’m trying to upgrade my stronghold to level 15 but can’t because I only have 856k iron. I can’t upgrade my level 14 iron unless I have a stronghold 15. I can’t convert or build anywhere. Do you understand my dilemma? I emailed support twice. The 1st reply was to look at their FAQ which was no help. The 2nd try & reply was that they were too busy & wouldn’t look into it. They offered the suggestion of online forums…
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You can never upgrade any buildings beyond the level of your stronghold.
You probably need to upgrade your iron storages.
If your iron storage capacity is high enough, then you just need to wait to build up more iron.
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I’m maxed out on storage on 3 level 14 iron storage. I can’t upgrade anything, store anything, or build/ move/ convert. I’m stuck.
Did you turn one of your iron storages into your barracks? That’s the only reason I can image.
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You just need to wait then until you accrue enough iron to upgrade your stronghold.
Or upgrade a different building.
The level 15 upgrade costs 903,000 iron, so should be available to you quite soon.
I did turn something into my barracks a while back. Now I can only convert it to a forge building & nothing else.
According to some things I see online, you should have 4 storages available. At level 14 they have 270,000 each. Giving a potential 1,080,000 if maxed and full. Stronghold 15 is only 903,000 iron
Silly question - Do you have any open spaces to put buildings? If so, you should be able to build a 4th iron storage.
Also, take a screenshot or 2 of your base and add them to this thread. We’re visual peeps around here so that would really help us help you 
EDIT: Looks like you had the same idea!
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Of you click on each individual one what do they all say for capacity, this is strange.
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I have no open spots & all 3 iron storage say the same thing
What is the building under construction? If that’s an iron storage that’s probably the answer…
It’s a mine level 11
I’ve never seen a problem like that, all I could suggest is make sure your game is backed up and reinstall.
I’m guessing I’ll be getting more iron that I won’t be able to store…
Can’t remember when the new area opens, but I believe you get capacity for another storage, mine or ? there…(the grayed-out area on bottom right )
Finally found your 4th iron storage down by your crafting building. The health potions are obscuring the buildings level. Is that a level 4 or a level 14?
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Ironically level 15 stronghold
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Holy crap! I totally didn’t see that! It’s a level 4 
I guess I’ll wait until my mine is done upgrading & go from there. I’ll keep everyone posted! Thank you, I think you nailed it LadySuzanne! I 
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