unable to open my web planner project on project application

@JHH, Thanks for posting in Q&A. From your description, it seems you have question with project which we are not familiar. You can ask under the following Microsoft 365 Project forum to get help.

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_project?sort=LastReplyDate&dir=Desc&tab=All&status=all&mod=&modAge=&advFil=&postedAfter=&postedBefore=&threadType=all&isFilterExpanded=true&page=1

Thanks for your understanding.

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