Can't calculate 95% CI for AUC

[dhananyashunmugam]

I have 3 classes , using multiROC i have calculated AUC for class1,2,3, macro AUC and micro AUC. I want to calculate 95% CI for all AUC. My dataset is imbalance so I have used roc_auc_with_ci_strata function to calculate that. And also I have AUC for class1=1, class2=1, class3=1, Micro AUC=1, Macro AUC=0.97. When i try the function, I'm getting this error,

"All values of t are equal to 1 \n Cannot calculate confidence intervals"
Error in x[[jj]][iseq] <- vjj : replacement has length zero

When I check the code,

res_boot

STRATIFIED BOOTSTRAP

Call:
boot(data = final_df, statistic = multi_roc_auc, R = R, strata = final_df$class)

Bootstrap Statistics :
original bias std. error
t1* 1.0000000 0 0
t2* 1.0000000 0 0
t3* 1.0000000 0 0
t4* 0.9770418 0 0
t5* 1.0000000 0 0

Kindly help to solve this error