Caesar Cipher C, correct output but failed tests

Hi all,

I am doing the problem set 2 and I am getting correct outputs but when I run the check i get almost all errors.

Here is my code

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https://preview.redd.it/7m47zxj94o481.png?width=778&format=png&auto=webp&s=e25a658d0561c9d1b83f1bf0b865a5737272b214

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And this is the result from the checks

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https://preview.redd.it/6vwtwly34o481.png?width=1088&format=png&auto=webp&s=e04f93434633de5eaedfb242148b25e712214915