OCR error：图片解码失败

请问这是什么原因？要如何解决呢？

OCR error：图片解码失败

Traceback (most recent call last):

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.16.48\python\lib\runpy.py", line 193, in _run_module_as_main

   "__main__", mod_spec)

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.16.48\python\lib\runpy.py", line 85, in _run_code

   exec(code, run_globals)

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.16.48\python\lib\site-packages\xbot_interpreter.py", line 113, in <module>

   main()

 File "C:\Program Files (x86)\ShadowBot\shadowbot-5.16.48\python\lib\site-packages\xbot_interpreter.py", line 57, in main

   try:

 File "C:\Users\zhenghan\AppData\Local\ShadowBot\users\657862415679246338\apps\a99311ae-b1f5-4d46-89d8-9c63795fb0ad\xbot_robot\process6.py", line 9, in main

   note_invoice = xbot_visual.ocr.note_discern(ai_engine="shadowbot", note_type="vat_invoice", image_source="disk", path="C:\\Users\\zhenghan\\Desktop\\1\\92848956.pdf", url=None, is_pdf=False, pdf_page_number="1", _block=("子流程6", 1, "票据识别"))

 File "<string>", line 92, in wrapper

 File "<string>", line 87, in wrapper

 File "<string>", line 497, in note_discern

 File "<string>", line 122, in vat_invoice

 File "<string>", line 67, in vat_invoice

 File "<string>", line 320, in _invoke

 File "<string>", line 115, in execute

 File "<string>", line 88, in execute

xbot.errors.UIAError: Message:OCR error：图片解码失败

Code:109,StackTrace:

  at S3mMptf3ey3443luoP9.nE26yAfIKh45Uv4dhyU.lw4frGVWap(String  , Object  ) in D:\Work\xbot-v5-uia\src\ShadowBot.UIAutomation.Provider\UIAutomation\OCR\TencentOCREngine.cs:line 494

  at S3mMptf3ey3443luoP9.nE26yAfIKh45Uv4dhyU.Ol4fPS7SYp(String  , String  , Boolean  , UInt64  ) in D:\Work\xbot-v5-uia\src\ShadowBot.UIAutomation.Provider\UIAutomation\OCR\TencentOCREngine.cs:line 162

  at ShadowBot.UIAutomation.Provider.Service.OCR.TencentOCRService.VatInvoice(String id, E9fVcPfiARtsY1GTJMk xbotImage, Boolean isPdf, UInt64 pdfPageNumber) in D:\Work\xbot-v5-uia\src\ShadowBot.UIAutomation.Provider\Service\OCR\TencentOCRService.win.cs:line 64

  at lambda_method29(Closure , kaHBUtKwvEY3UT4j8jw , Object[] )

  at dOMJO8KiFdvLDEJ9bH4.HTmM5GKnCxAH50PvRH4.H7uKkuHHgX(kaHBUtKwvEY3UT4j8jw  , hiR5HuYHHeggtdQMOkA  ) in D:\Work\xbot-v5-uia\src\ShadowBot.UIAutomation.Provider\Common\IPC\IPCActionInvoker.cs:line 63

  at P9NlQMKFaOASmqGvAKr.DqiepeKJ7grnrV6NVPB.iUbKrrqKVs(kaHBUtKwvEY3UT4j8jw  , pD050pKToWxEoHbgbKu  ) in D:\Work\xbot-v5-uia\src\ShadowBot.UIAutomation.Provider\Common\IPC\IPCActionInfo.cs:line 34

  at na29bOhSCsrvVQ6su4l.w3Y8ABhw2sjvnhGqohg.KZXhGL7xwI(pD050pKToWxEoHbgbKu  ) in D:\Work\xbot-v5-uia\src\ShadowBot.UIAutomation.Provider\Common\IPC\IPCServiceInfo.cs:line 52