Audacity won't export (Windows 10)

I recorded a session and saved it as an .aup file, and had to record a few soundbites within the same file after the initial recording. However, whenever I try exporting it as an mp3, the file disappears after processing fully (even on different qualities/bitrates), which is odd as it was exporting just fine last night. I also am no longer to play videos through the Windows app due to a “missing codec” (where I could just yesterday), could this be why? And if it helps, this ( ) is the log as well as the file itself, as I cannot upload the data folder directly. If anyone has any advice on how to proceed, let me know, thank you!