Error fetching Account Info on Android Kotlin `java.nio.BufferUnderflowException`

I want to fetch an account's data using [Metaplex KT Library][1].

I am still facing error while fetching an account:code:

try {             val serializer = SolanaAccountSerializer(BorshAsBase64JsonArraySerializer((ProgramInfo.serializer())))                val account = solana.api.getAccountInfo(serializer, getProgramInfoPda().address).getOrThrow()                Log.d(TAG, "fetchQuestionCount: ${account}")            } catch (e: Exception) {                Log.d(TAG, "fetchQuestionCount Error: ${e.message}")         }

Context: ProgramInfo is my own class:

@Serializabledata class ProgramInfo(var author: @Contextual PublicKey, var question_count: @Contextual Number, var bump: @Contextual Number) {}

This is the error:Error: Size must be known in advance when using READ_ALL