Inheritance security rules violated by type error after 23.10 studio upgrade

[nandinihu.0112]

After upgrading UiPath one of our processes produces the following error upon opening. All of the processes within this project also now appear as blank:
Inheritance security rules violated by type: ‘NPOI.OpenXml4Net.Util.ZipInputStreamZipEntrySource+FakeZipEntry’. Derived types must either match the security accessibility of the base type or be less accessible.

[logesh_svelu]

Hi @nandinihu.0112 Which version of the Excel Activities package does your process use? Since the issue seems related to the UiPath Excel Activities package (more specifically related to NPOI SharpZipLib), try upgrading or downgrading the package to see if that resolves the problem. If you are unable to load the project in Studio, update the version directly in the project.json file and then reopen the project.

Be sure to back up your code before making any changes.

[nandinihu.0112]

Thank you. Its working now