First, when errors or warnings appear during the conversion process, carefully read the information displayed on the screen. These messages usually give a specific description of the problem or point to possible causes.
Confirm that the file you are trying to convert is not damaged and conforms to the file format and size limits supported by the website. Corrupted files or unsupported file formats may cause conversion failures.
Review and check the settings you selected during the conversion process to ensure that they are appropriate for your file type and needs. Inappropriate settings may cause errors or warnings.
Sometimes, simply re-uploading the file can solve the problem, especially if there may have been a network interruption or file transfer error during the previous upload process.
Try changing the browser for the conversion, as some problems may be related to the compatibility of a specific browser.