message in COPASI in importing SBML map exported from GPML

message in COPASI that does not apply to package multi:
SBML (40): LIBSBML ERROR 10103 at line 8346 column 10: An SBML XML document must conform to the XML Schema for the corresponding SBML Level, Version and Release. The XML Schema for SBML defines the basic SBML object structure, the data types used by those objects, and the order in which the objects may appear in an SBML document. Attribute '' on an <TextGlyph> must not be an empty string. .

gpml: https://pg-sandbox.uni.lu/minerva/index.xhtml?id=WP673_108769#
exported sbml file model-4.xml