Bug: Script Task - Cannot load script for execution

My Script Tasks are running fine in Visual Studio 2017, but when deployed to the catalog I get an error in all Script Tasks: Cannot load script for execution
Error: Cannot load script for execution

There is a bug in SSDT for Visual Studio 2017 (15.8.1). The (temporary) workaround is to NOT use SSDT 2017 for deployment. Instead you could use SSMS to deploy your SSIS projects.
Deploy packages with SSMS

Or use ISDeploymentWizard.exe in the folder C:\Program Files (x86)\Microsoft Visual Studio\2017\SQL\Common7\IDE\CommonExtensions\Microsoft\SSIS\150\Binn\  to deploy your projects.

Expect an update soon!

UPDATE: SSDT 15.8.2 is available
Fixed an issue that deploying SSIS project which contains packages containing Script Task/Flat file destination to Azure-SSIS will result in the packages failing to execute in Azure-SSIS