Microsoft project management software used to plan, manage, and communicate a project schedule and other information among workgroup members, project managers, and other stakeholders.
Hi Poul,
Thanks for posting in the community. We are happy to help you.
I understand the inconvenience you are experiencing. Per your description, the problem is with a specific file and is occurring on some user-sides, not all. In this case, I suggest you try the following suggestions and check again. If the problem persists, you can share the results with us, which will help us narrow down the problem.
- Check the View setting
Click the View tab, in the Window group, click on "Arrange All". See if you can see tasks.
- Insert as Subproject. See if you can see tasks.
Create a blank new project and then insert the project as subproject via the Project tab> Subproject.
- Repair Project
Go to Windows Settings> Apps> Installed apps> find the Project app, such as Microsoft Project en-us> select Modify> choose Online Repair. After repairing, please run Project and check again.
- If the problem persists after trying the above suggestions, for testing purposes, I suggest you switch to another Windows user profile (if you don’t have another Windows user profile, please try the steps in the "Switch user" section and sign into another account), then run Project and check again. This can help us to troubleshoot whether the issue is caused by the local environment in your original Windows user profile.
We look forward to your response. Thanks for your cooperation. 😊
Sincerely,
George | Microsoft Community Moderator