2014 Robes of the Archmagi AC Bug

The 2014 version of The Robes of the Archmagi are adding 15 AC before Dex Modifiers, when they should be  changing the base AC to 15 before Dex Modifiers. For example, AC that should go from 11 to 16 with the robes equipped are instead going from 11 to 26. Thanks!

Hi Sassica,  More information is required, such as which character sheet this is on. If you don't know the name please supply a screenshot.

Apologies. It's the "D&D 5E 2014 By Roll20" Sheet. And this is the macro for the item itself as it shows up under Attributes & Abilities {"AC":"15","Source":"5th Edition SRD","Subtype":"Wondrous Item, Robe","Category":"Items","Item Type":"Wondrous Item","Modifiers":"Spell Attack +2, Spell DC +2","data-List":"false","Item Rarity":"Legendary","filter-Lists":"Wondrous Item","filter-Charges":"No","data-datarecords":"[{\"name\":\"Robe of the Archmagi\",\"payload\":\"{\\\"type\\\":\\\"Item\\\",\\\"name\\\":\\\"Robe of the Archmagi\\\",\\\"description\\\":\\\"(requires attunement by a Sorcerer, Warlock, or Wizard)\\\\nThis elegant garment is made from exquisite cloth of white, gray, or black and adorned with silvery runes. The robe's color corresponds to the alignment for which the item was created. A white robe was made for good, gray for neutral, and black for evil. You can't attune to a robe of the archmagi that doesn't correspond to your alignment.\\\\n\\\\nYou gain these benefits while wearing the robe:\\\\n\\\\n    If you aren't wearing armor, your base Armor Class is 15 + your Dexterity modifier.\\\\n    You have advantage on saving throws against spells and other magical effects.\\\\n    Your spell save DC and spell attack bonus each increase by 2.\\\",\\\"weight\\\":\\\"\\\",\\\"cost\\\":\\\"\\\",\\\"rarity\\\":\\\"Legendary\\\",\\\"equipData\\\":{\\\"equippable\\\":true}}\"},{\"name\":\"Robe of the Archmagi Attunement\",\"parent\":\"Robe of the Archmagi\",\"payload\":\"{\\\"type\\\":\\\"Attunement\\\",\\\"requireEquip\\\":true}\"},{\"name\":\"Robe of the Archmagi Spell Bonus\",\"parent\":\"Robe of the Archmagi Attunement\",\"payload\":\"{\\\"type\\\":\\\"Roll Bonus\\\",\\\"bonusCategory\\\":[\\\"Attacks\\\"],\\\"bonusName\\\":[\\\"Spell Attack\\\",\\\"Spell Save\\\"],\\\"bonusDetails\\\":\\\"Modifier\\\",\\\"bonusValue\\\":2}\"},{\"name\":\"Robe of the Archmagi AC Base\",\"parent\":\"Robe of the Archmagi Attunement\",\"payload\":\"{\\\"type\\\":\\\"Armor Class\\\",\\\"calculation\\\":\\\"Set Base\\\",\\\"source\\\":\\\"Armor\\\",\\\"valueFormula\\\":{\\\"flatValue\\\":15}}\"},{\"name\":\"Robe of the Archmagi Spell Save Advantage\",\"parent\":\"Robe of the Archmagi Attunement\",\"payload\":\"{\\\"type\\\":\\\"Roll Bonus\\\",\\\"bonusCategory\\\":[\\\"Saving Throws\\\"],\\\"bonusName\\\":[],\\\"bonusDetails\\\":\\\"Keep Highest\\\",\\\"bonusValue\\\":1,\\\"diceCount\\\":2,\\\"situation\\\":\\\"Advantage on saving throws against spells and other magical effects.\\\"}\"}]","filter-Attunement":"Yes","filter-Consumable":"No","blobs":{},"expansion":34047}

Hi Sassica,  Please hover over the item on your equipment list. Click the "i" in the weight section.  Under mods change "Wondrous Item" to "Light Armor". Here is what the mods line should be made to look like:  Item Type: Light Armor, AC: 15, Spell Attack +2, Spell DC +2 What is going on:  AC: 15 means +15 unless the Item type is Light Armor, Medium Armor, or Heavy Armor. Anything besides those three (such as Wondrous Item) means that AC will add to your AC, not start at that value.  Now, obviously this isn't Light Armor, but we have to pretend it is to make this work. :)

That does work! Thank you! For anyone else who happens across this a random search, this is what it looks like: