Reconciliation Excel Workbook Error

Hello! I'm semi-new to IT (been at it a couple years), and have run into an issue with an Excel workbook. Half the users in the affected team are still able to access this workbook with no issue, but the other half get various errors such as "[DataFormat.Error] File contains corrupted data." and "[DataFormat.Error] We were unable to load this Excel file because we couldn't understand its format or decrypt it. File contains corrupted data.". Both errors reference data corruption, but how can that be if other users are able to access it just fine (including myself)? It's located in a shared network drive, and I've triple check there's no differences in AD that could affect access. I would ask the person who set it up, but they have been gone for a couple years. This is a recent thing, and the team reports users started getting the errors all within a month of each other. Does anyone have an idea of what could be going on? I've never created a file that pulls information from another data source, but I figured there shouldn't be an issue with that link since it works fine for others. We even tried completely uninstalling and reinstalling O365 for someone to see if that would help, but it did not. Let me know if there's more info I should be providing. Thanks!