We're in the process of figuring out what is going on with non-ascii encoded files, as another user has reported similar problems.
My theory is that your source/data files are encoded in ISO-8859/Windows 1252, which R we're not able to decode (they should be encoded in UTF-8).
./funktionen.R: UTF-8 Unicode text, with CRLF line terminators
./gametable.csv: ISO-8859 text, with CRLF line terminators
./manifest.json: ASCII English text, with very long lines, with CRLF line terminators
./player.csv: ASCII text, with very long lines, with CRLF line terminators
./read_html.R: ISO-8859 text, with CRLF line terminators
./server.R: ISO-8859 text, with CRLF line terminators
./test_read_html.R: ISO-8859 text, with CRLF line terminators
./ui.R: UTF-8 Unicode text, with CRLF line terminators