My problem develops as following.
I delete the .bbl .bcf .blg files.
I run pdflatex without errors.
I run biber without errors.
I run pdflatex again, and I get the error
"Package inputenc Error: Unicode char ́ (U+301) (inputenc) not set up for use with LaTeX │l.15 \printbibliography[heading=bibintoc]
As I use classicthesis, my configuration for biber looks as following:
\PassOptionsToPackage{backend=biber, bibencoding=utf8}{biblatex}
\usepackage{biblatex}
How can that problem arise?
edit: Like the comments' links to other problems outlined, biber--output-safechars worked for me.
\'{\i}or\'ior something similar. See also https://tex.stackexchange.com/q/251261/35864 and linked questions. Or try\DeclareUnicodeCharacter{0301}{XXXXX}and search forXXXXX– moewe Jun 20 '18 at 13:46--output-safecharsis the "least best" of all options. Using Unicode characters likeídirectly instead of\'{\i}or at least\'ior PLK's sourcemap seem nicer to me. – moewe Jun 20 '18 at 13:52