Does the error occur with every SVG file you try to save as XCF file or only with some files?
Can you attach a sample SVG file that fails to save as XCF file?
Possibly related to bug #485027 “Export to Gimp XCF returns deprecation warnings” (fixed in 0.48), though AFAIU the deprecation warning should not prevent the extension from working (it's just a warning). Which Python version do you have installed?
Does the error occur with every SVG file you try to save as XCF file or only with some files?
Can you attach a sample SVG file that fails to save as XCF file?
Possibly related to bug #485027 “Export to Gimp XCF returns deprecation warnings” (fixed in 0.48), though AFAIU the deprecation warning should not prevent the extension from working (it's just a warning). Which Python version do you have installed?