This question already has an answer here:
Import: Version 11.2 works correctly, no problem with non-ASCII characters in the path of file. But upgrated version 11.3
a) does not import these files
b) reports an error
Import::fmterr: Cannot import data as XLSX format (i.e. unclear problem report, no "non--ASCII characters" or some similar)
How to fix this problem, with respect to previous functionality?
EDIT: This is for 11.3 while the previous question was wrt an unrelated issue in 10.0