```python
from typing import List

def unpack_frame(data: List[int]) -> List[int]:
    if not isinstance(data, list):
        raise ValueError("Input must be a list")
    
    if not all(0 <= byte <= 255 for byte in data):
        raise ValueError("All bytes must be in the range 0-255")
    
    if len(data) == 0:
        return []
    
    if data[0] == 0:
        return []
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if len(data) > 5:
        raise ValueError("Varint longer than five bytes")
    
    if data[-1] == 0:
        raise ValueError("Trailer is a wasted zero")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 256:
        raise ValueError("Trailer does not match the byte sum")
    
    if data[-1] != sum(data[:-1]) % 