Does anyone know how to solve this problem?

(The filename follows Jekyll’s specific filename requirements.)

According to the text something is wrong with the filename, and you’ll need to rename the file. Without seeing that it’s impossible to say how exactly.

In general when asking about GitHub Lab courses it’s best to include a link to the issue or PR in your course repo.

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I’m checking at your profile, I cannot see the exact repo too,

you can also restart the course

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