Power price API -> grp. adresses on Wiser

[ClausP]

Hello people!
Im all new to all this scripting thing with my Wiser.
I have been looking at the forum, and found an other script that more or less say it does what I want.
Then i've changed some of the parameters and the API.

When I run the script i just get this awnswer in the alert log:

Resident script:12: attempt to index a nil value
stack traceback:

Can anyone help?  

Code:

require('json')
https = require 'ssl.https'
date = os.date('%Y-%m-%d')



url = 'https://api.energidataservice.dk/dataset/Elspotprices?offset=0&filter=%7B%22PriceArea%22:%22dk1%22%7D&sort=HourDK%20DESC&timezone=dk&limit=24'
status = ssl.https.request(url)

data = json.decode(status)

price1 = data[1].SpotPriceDKK
grp.checkupdate('5/5/1', price1)

price2 = data[2].SpotPriceDKK
grp.checkupdate('5/5/2', price2)

price3 = data[3].SpotPriceDKK
grp.checkupdate('5/5/3', price3)

price4 = data[4].SpotPriceDKK
grp.checkupdate('5/5/4', price4)

price5 = data[5].SpotPriceDKK
grp.checkupdate('5/5/5', price5)

price6 = data[6].SpotPriceDKK
grp.checkupdate('5/5/6', price6)

price7 = data[7].SpotPriceDKK
grp.checkupdate('5/5/7', price7)

price8 = data[8].SpotPriceDKK
grp.checkupdate('5/5/8', price8)

price9 = data[9].SpotPriceDKK
grp.checkupdate('5/5/9', price9)

price10 = data[10].SpotPriceDKK
grp.checkupdate('5/5/10', price10)

price11 = data[11].SpotPriceDKK
grp.checkupdate('5/5/11', price11)

price12 = data[12].SpotPriceDKK
grp.checkupdate('5/5/12', price12)

price13 = data[13].SpotPriceDKK
grp.checkupdate('5/5/13', price13)

price14 = data[14].SpotPriceDKK
grp.checkupdate('5/5/14', price14)

price15 = data[15].SpotPriceDKK
grp.checkupdate('5/5/15', price15)

price16 = data[16].SpotPriceDKK
grp.checkupdate('5/5/16', price16)

price17 = data[17].SpotPriceDKK
grp.checkupdate('5/5/17', price17)

price18 = data[18].SpotPriceDKK
grp.checkupdate('5/5/18', price18)

price19 = data[19].SpotPriceDKK
grp.checkupdate('5/5/19', price19)

price20 = data[20].SpotPriceDKK
grp.checkupdate('5/5/20', price20)

price21 = data[21].SpotPriceDKK
grp.checkupdate('5/5/21', price21)

price22 = data[22].SpotPriceDKK
grp.checkupdate('5/5/22', price22)

price23 = data[23].SpotPriceDKK
grp.checkupdate('5/5/23', price23)

price24 = data[24].SpotPriceDKK
grp.checkupdate('5/5/24', price24)





medelpris = price1+price2+price3+price4+price5+price6+price7+price8+price9+price10+price11+price12+price13+price14+price15+price16+price17+price18+price19+price20+price21+price22+price23+price24
gennemsnit = medelpris / 24
grp.checkupdate('5/5/25', gennemsnit)

maxpris = math.max(price1, price2, price3, price4, price5, price6, price7, price8, price9, price10, price11, price12, price13, price14, price15, price16, price17, price18, price19, price20, price21, price22, price23, price24)
grp.checkupdate('5/5/26', maxpris)

minpris = math.min(price1, price2, price3, price4, price5, price6, price7, price8, price9, price10, price11, price12, price13, price14, price15, price16, price17, price18, price19, price20, price21, price22, price23, price24)
grp.checkupdate('5/5/27', minpris)


log(price1, price2)