Very hard to say from a bad picture. But definitely drop the BDAYBook1.xlsx part of the Libname Statement.
Typically you get that error if there is a mismatch in bitness between SAS and MS Office. For example, SAS is 64-bit and Office is 32-bit. This only applies to the EXCEL LIBNAME engine.
Try LIBNAME bday XLSX "<Your Excel spreadsheet path>";
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