Here are some we’ve encountered with resolutions.
Failed to decrypt protected XML node ... "Key not valid for use in specified state."
The creator of the package is someone else than the process owner of the account running it.
If you create the package and run from within SQL the executing account would be the service account.
https://www.mssqltips.com/sqlservertip/2091/securing-your-ssis-packages-using-package-protection-level/