Django celery task unable to use cairo svg2pdf - django

Question

I have a small task that reads a svg file from a path and uses cairo svg2pdf to convert the svg to pdf. If I run the function without using celery delay then the function runs fine and converts the file to pdf. If I run the function as a celery task then I get some errors:
Traceback (most recent call last):
File "/..../tasks.py", line 24, in create_download_pdf
svg2pdf(bytestring=bytestring, write_to=completeName)
File "/.../lib/python3.10/site-packages/cairosvg/__init__.py", line 67, in svg2pdf
return surface.PDFSurface.convert(
File "/.../lib/python3.10/site-packages/cairosvg/surface.py", line 131, in convert
instance = cls(
File "/.../lib/python3.10/site-packages/cairosvg/surface.py", line 202, in __init__
self.cairo, self.width, self.height = self._create_surface(
File "/.../lib/python3.10/site-packages/cairosvg/surface.py", line 242, in _create_surface
cairo_surface = self.surface_class(self.output, width, height)
File "/.../lib/python3.10/site-packages/cairocffi/surfaces.py", line 876, in __init__
Surface.__init__(self, pointer, target_keep_alive=write_func)
File "/.../lib/python3.10/site-packages/cairocffi/surfaces.py", line 158, in __init__
self._check_status()
File "/../lib/python3.10/site-packages/cairocffi/surfaces.py", line 170, in _check_status
_check_status(cairo.cairo_surface_status(self._pointer))
File "/../lib/python3.10/site-packages/cairocffi/__init__.py", line 88, in _check_status
raise exception(message, status)
OSError: [Errno cairo returned CAIRO_STATUS_WRITE_ERROR: b'error while writing to output stream'] 11
Here is the function:
#app.task(name="create_download_pdf")
def create_download_pdf(folder_path: str, svg_data=None, filename=None, file_path=None) -> None:
try:
completeName = os.path.join(folder_path, f"{filename}.pdf")
if svg_data:
svg2pdf(bytestring=svg_data, write_to=completeName)
elif file_path:
with open(file_path, 'r') as f:
bytestring=f.read()
print(bytestring)
svg2pdf(bytestring=bytestring, write_to=completeName)
except (OSError, ValueError):
logger.exception(
f"PDF creation and download exception: Unable to download | create PDF from svg data for {str(filename) or ''}. \n \
{traceback.format_exc()}"
)
pass
How can this be solved. I am not sending a file to celery task, therefore, its not that problem.