Hi @Anonymous
- If you are creating a ".docx" file in "Create File" action, please use a ".docx" extension instead of ".pdf" in the Word Doc to PDF conversion connector's action.
- I noticed you are using some sort of timestamp for the file name. Ensure you are using the same timestamp/name to access the file.
For other issues, please read the below snippet from another discussion (linked at the bottom):
Option 1 [using 'Name' dynamic content]:

"Location": The SharePoint site
"File": Provide the path from the "Documents" folder (or your Document Library location), until the file.
For example, if the full path is "/Shared Documents/Documents/<FolderA>/<filename.docx>", then put it as:
/FolderA/<"Name" dynamic content>
Option 2 [using 'Path' dynamic content]:

"Location": The SharePoint site
"File": replace(outputs('Save_the_file_in_SharePoint')?['body/Path'], '/Shared Documents', '')
Option 2 is less error-prone so I'd prefer that!
Discussion thread where I found the solution:
Re: Flow Action - Convert Word Document to PDF - Page 2 - Microsoft Tech Community
Hope this helps 🙂