[BUG] Can not retrieve anything when indexed a pdf file using Adobe Reader
Description
indexing step output
use_quick_index_mode False reader_mode adobe Using reader <kotaemon.loaders.adobe_loader.AdobeReader object at 0x15ff5dc30> Got 0 page thumbnails Adding documents to doc store Getting embeddings for 66 nodes Adding embeddings to vector store indexing step took 6.741843223571777
chating step output
User-id: 1, can see public conversations: True Session reasoning type None Session LLM None Reasoning class <class 'ktem.reasoning.simple.FullQAPipeline'> Reasoning state {'app': {'regen': False}, 'pipeline': {}} Thinking ... Retrievers [DocumentRetrievalPipeline(DS=<kotaemon.storages.docstores.lancedb.LanceDBDocumentStore object at 0x1616b26e0>, FSPath=PosixPath('/Users/zhangcheng/code/python/kotaemon/ktem_app_data/user_data/files/index_1'), Index=<class 'ktem.index.file.index.IndexTable'>, Source=<class 'ktem.index.file.index.Source'>, VS=<kotaemon.storages.vectorstores.chroma.ChromaVectorStore object at 0x1616b2710>, get_extra_table=True, llm_scorer=LLMTrulensScoring(concurrent=True, normalize=10, prompt_template=<kotaemon.llms.prompts.template.PromptTemplate object at 0x1722b8700>, system_prompt_template=<kotaemon.llms.prompts.template.PromptTemplate object at 0x1722bbdf0>, top_k=3, user_prompt_template=<kotaemon.llms.prompts.template.PromptTemplate object at 0x1722b8730>), mmr=True, rerankers=[CohereReranking(cohere_api_key='<COHERE_API_KEY>', model_name='rerank-multilingual-v2.0')], retrieval_mode='hybrid', top_k=10, user_id=1), GraphRAGRetrieverPipeline(DS=<theflow.base.unset_ object at 0x1055aee90>, FSPath=<theflow.base.unset_ object at 0x1055aee90>, Index=<class 'ktem.index.file.index.IndexTable'>, Source=<theflow.base.unset_ object at 0x1055aee90>, VS=<theflow.base.unset_ object at 0x1055aee90>, file_ids=[], user_id=<theflow.base.unset_ object at 0x1055aee90>)] searching in doc_ids ['8e51f681-7544-4979-95c8-e423667a1107'] retrieval_kwargs: dict_keys(['do_extend', 'scope', 'filters', 'mode', 'mmr_threshold']) Got 0 from vectorstore Got 0 from docstore Cohere API key not found. Skipping rerankings. Got raw 0 retrieved documents thumbnail docs 0 non-thumbnail docs 0 raw-thumbnail docs 0 retrieval step took 1.1629290580749512 Got 0 retrieved documents len (original) 0 Got 0 images Trying LLM streaming Got 0 cited docs
Reproduction steps
1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error
Screenshots

Logs
No response
Browsers
Chrome
OS
MacOS
Additional information
The same operational steps allow the content to be searched correctly using PDFThumbnailReader, but when indexing the file with AdobeReader, no content can be retrieved. Any suggestions?
there is 'Chinese content' in the .pdf, does the language matters?