If an error occurs when you try to extract, using a Windows built-in feature, a ZIP file created by bulk-downloading Assignment submission files, one possible cause is that some filenames inside the ZIP file are extremely long.
(When a ZIP file contains files with excessively long names, Windows built-in extraction may be unable to extract it. This is a general Windows limitation and is unrelated to LMS/MORE.)
Such ZIP files are likely to extract successfully if you use extraction software other than the Windows built-in feature, such as the widely used 7-Zip.
(However, this support site does not recommend the use of tools that are not directly related to LMS/MORE. This is offered only as one option for resolving the issue; it does not guarantee such software's operation or provide instructions on how to use it.)
Because the underlying cause is likely an excessively long filename in a submitted file, a preventive measure is to inform all submitters in advance not to use long filenames. You can also instruct students who submitted a file with a long filename to shorten the name and submit it again.