What could be causing a problem with uploading files in next.js when using multer?

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There are several potential causes for issues with uploading files in Next.js when using Multer:

1. Incorrect setup: Multer requires specific middleware setup to handle file uploads, and if this setup is not done correctly or if the configuration is incorrect, the uploads may fail.

2. File size limitations: Multer has default file size limitations that may cause issues if the files being uploaded are larger than what is allowed.

3. Permission issues: The application may not have permission to write files to the disk, which can prevent successful file uploads.

4. Network issues: Poor network connectivity or server issues can impact file uploads, leading to errors or incomplete uploads.

5. Client-side errors: Issues with the client-side code, such as errors in handling the file uploads, could also cause problems with file uploads in Next.js.