Hi @Anonymous,
Could you please share more details about your scenes?
Could you please share more details about the error message about your trigger when the flow runs?
Could you please share a screenshot about the run details of your fllow when the trigger run failed?
I have made a test on my side and don't have the issue that you mentioned, the screenshot of my flow as below:

When a file is created in the share folder of dropbox, the flow would run successfully as below:

Please check if you have created a file in the scansnap folder in your dropbox to trigger the flow.
Please share more details about your problem so we could provide a proper workaround for you.
Please let me know if your problem could be solved.
Best regards,
Alice