Hi @Anders Johansson,
Welcome to Microsoft Q&A!
Please try the following:
- Open Visual Studio Installer > Modify > check that you have the Data storage and processing workload installed.
- Launch Visual Studio > Extension > Manage Extensions > Installed > ensure that the SSIS extension is enabled.
- Right-clicking on the solution in the Solution Explorer, if you can find the “Resolve Errors”, please click on it.
- Right-clicking on the project in the Solution Explorer > Reload project.
Sincerely,
Anna
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