Applying E visa for the family

Hi
We are a Sri Lankan family who lives in UK and permanent residence in UK and have Sri Lankan passports . We haven’t applied for the British passport for the kids and they also have the Sri Lankan passports and haven’t got BRP card as me and my husband. So when I tried to apply for the evisa it’s asking either visa or the residency card details which we don’t have for the kids . How to apply for the visa please.
Many thanks

(testing-form)

Hi
We are a Sri Lankan family who lives in UK and permanent residence in UK and have Sri Lankan passports . We haven’t applied for the British passport for the kids and they also have the Sri Lankan passports and haven’t got BRP card as me and my husband. So when I tried to apply for the evisa it’s asking either visa or the residency card details which we don’t have for the kids . How to apply for the visa please.
Many thanks