The most common and most likely answer to this crossword clue is the 8 letter word BLUNDERS
I've seen this crossword clue in The Times
B
L
U
N
D
E
R
S
More clues leading to the result BLUNDERS
Buddy explains!

The straight part
We know that "awful errors" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case awful errors = blunders.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BLUNDERS mean?
BLUNDERS noun- A clumsy or embarrassing mistake.
- A very bad move, usually caused by some tactical oversight.
- To make a clumsy or stupid mistake.
- To move blindly or clumsily.
- To cause to make a mistake.
- To do or treat in a blundering manner; to confuse.