After I have upgraded the ‘bbotk’ to version 0.8.0.9000 and the ‘mlr3fselect’ to version 0.12.0.9000, the error will occur when i run the example codes.

library("mlr3verse")
library('mlr3fselect')

tsk("spam")

instance = fsi(
task = tsk("spam"),
learner = lrn("classif.svm", type = "C-classification"),
resampling = rsmp("cv", folds = 3),
measures = msr("classif.ce"),
terminator = trm("evals", n_evals = 20)
)

Error in eval(inherit, parent_env, NULL) :
object ‘OptimInstanceSingleCrit’ not found

I have tried to downgrade ‘bbotk’ to version 0.8.0 and ‘mlr3fselect’ to 0.12.0 both or solely, but the error remains.