Hi,
For troubleshooting this issue, let's verify the followings:
- What size is the project file?
- Whether all project files have this issue.
- Whether other type files have this issue, like word or excel.
Please create a small project file, and open it from a SharePoint site, compare the result.
Please make sure your Project server is online, and you can access your Project server from your machine.
In addition, if this issue only happened for project files, I suggest you create a new thread on Project forum, more experts will assist you with Project.
Project forum:
https://social.technet.microsoft.com/Forums/projectserver/en-US/home
Best Regards,
Wendy
Forum Support
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Wendy Li
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