Find command needs the directory to search in to end with a / (slash)

On some systems the 'find' command requires the name of the directory to search to end with a / (slash), or the 'find' command will return nothing [1].

Relevant snippet from [1]
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Note: On some systems, the name of the starting directory must end with a / (slash), or the find command will return nothing. Thus, the starting directory in the previous example would be designated as /prog/, with a trailing slash. On other systems, a trailing slash does not affect the command. A trailing slash is never needed when searching in / (the root directory), . (the current directory), or .. (the parent directory).
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[1] https://kb.iu.edu/d/admm