The white circle with a green check mark generally indicates that the file has been successfully processed. However, if you are experiencing difficulties uploading the PDF file, it could be due to various reasons such as exceeding file size limits or compatibility issues with the file format.
To resolve the upload issue, ensure that the PDF file adheres to the upload requirements, including being a supported file type and not exceeding the maximum size limit. Additionally, check for any error messages that might provide further details about the upload failure.