Windows 7, Opera, php 7.3 - works
1. You specify the mime_in rule twice. In the second case, non-mime types are specified and the field is different.
'mime_in[personal_info_blood_cert,docx,doc,jpg,JPG,jpeg,JPEG,pdf,png,epub,rtf]'
2. The mime type is determined through the FileInfo extension or, if it is not added, the type provided by the browser is used.