accuracy when training with 1 query set

[chaeeun1052]

When training with 5 classes, if the query set is composed of 1 per class, train acc is calculated as 0.2 and does not increase.
Even during evaluation, if the query set is composed of one per class, the accuracy is output as 0.2 +/- 0.
What is the cause of the problem and how can it be solved?