[v1.8.18] XMLSyntaxError - parser.pxi:631

OpenNumismat: 1.8.18
OS: Windows 10 (10.0.22621)
Python: 3.4.4 (32bit)
Qt: 5.5.1
Locale: pl

Traceback (most recent call last):
File "OpenNumismat\Collection\Import\Ans.py", line 717, in preview
File "lxml.etree.pyx", line 3092, in lxml.etree.fromstring (src\lxml\lxml.etree.c:70473)
File "parser.pxi", line 1828, in lxml.etree._parseMemoryDocument (src\lxml\lxml.etree.c:106307)
File "parser.pxi", line 1716, in lxml.etree._parseDoc (src\lxml\lxml.etree.c:105098)
File "parser.pxi", line 1086, in lxml.etree._BaseParser._parseDoc (src\lxml\lxml.etree.c:99780)
File "parser.pxi", line 580, in lxml.etree._ParserContext._handleParseResultDoc (src\lxml\lxml.etree.c:94254)
File "parser.pxi", line 690, in lxml.etree._handleParseResult (src\lxml\lxml.etree.c:95690)
File "parser.pxi", line 631, in lxml.etree._raiseParseError (src\lxml\lxml.etree.c:94969)
File "", line None
lxml.etree.XMLSyntaxError: