JSONDecode error

version = 0.14 import os import glob from datetime import datetime import time pdf_files = glob.glob(file_location + '/*.pdf') print(f'#PDF files found: {len(pdf_files)}!') pdf_reader = LayoutPDFReader(llmsherpa_api_url) doc1 = pdf_reader.read_pdf("path.pdf") Got error: JSONDecodeError Traceback (most recent call last) "name": "JSONDecodeError", "message": "Expecting value: line 1 column 1 (char 0)", "stack": "......" }