Typo is a type of error already. See typo in Merriam-Webster:

: an error (as of spelling) in typed or typeset material

 

[…]

 

Origin and Etymology of TYPO
short for typographical (error)

So I’d say, “Apologies for the typo,” or, especially in formal communication, “Apologies for the typographical error.”

Typo is a type of error already. See typo in Merriam-Webster:

: an error (as of spelling) in typed or typeset material

[…]

Origin and Etymology of TYPO
short for typographical (error)

So I’d say, “Apologies for the typo,” or, especially in formal communication, “Apologies for the typographical error.”