The tasks link from the menu on the left in my project site shows an error

%3CLINGO-SUB%20id%3D%22lingo-sub-2400768%22%20slang%3D%22en-US%22%3EThe%20tasks%20link%20from%20the%20menu%20on%20the%20left%20in%20my%20project%20site%20shows%20an%20error%3C%2FLINGO-SUB%3E%3CLINGO-BODY%20id%3D%22lingo-body-2400768%22%20slang%3D%22en-US%22%3E%3CP%3EUnable%20to%20access%20a%20planner%20task%20from%20the%20SharePoint%20Online%20page%3A%3C%2FP%3E%3CP%3E%26nbsp%3B%3C%2FP%3E%3CDIV%3E%3CH2%20id%3D%22toc-hId--443068329%22%20id%3D%22toc-hId--443068300%22%3ESomething%20went%20wrong%3C%2FH2%3E%3CSPAN%3EIf%20the%20problem%20persists%2C%20contact%20the%20site%20administrator%20and%20give%20them%20the%20information%20in%20Technical%20Details.%3C%2FSPAN%3E%3CDIV%3ETECHNICAL%20DETAILS%3C%2FDIV%3E%3CDIV%3E%3CSPAN%3EERROR%3A%3CBR%20%2F%3EThis%20plan%20has%20been%20deleted.%20Contact%20the%20plan%20owner.%3CBR%20%2F%3E%3C%2FSPAN%3E%3C%2FDIV%3E%3CDIV%3E%3CSPAN%3EgroupId%3D4f06325d-9f24-45cf-b31a-a305ee51164a%26amp%3BplanId%3Dgldsg9zbF0aDcp0jKvApP5cADIFY%3C%2FSPAN%3E%3C%2FDIV%3E%3CDIV%3E%26nbsp%3B%3C%2FDIV%3E%3CDIV%3E%3CSPAN%3EI%20checked%20the%20group%20in%20the%20azure%20ad%20and%20it's%20not%20deleted%20it%20present%20there.%3C%2FSPAN%3E%3C%2FDIV%3E%3C%2FDIV%3E%3C%2FLINGO-BODY%3E%3CLINGO-LABS%20id%3D%22lingo-labs-2400768%22%20slang%3D%22en-US%22%3E%3CLINGO-LABEL%3EOffice%20365%3C%2FLINGO-LABEL%3E%3CLINGO-LABEL%3EPlanner%3C%2FLINGO-LABEL%3E%3C%2FLINGO-LABS%3E
Occasional Contributor

Unable to access a planner task from the SharePoint Online page:

 

Something went wrong

If the problem persists, contact the site administrator and give them the information in Technical Details.
TECHNICAL DETAILS
ERROR:
This plan has been deleted. Contact the plan owner.
groupId=4f06325d-9f24-45cf-b31a-a305ee51164a&planId=gldsg9zbF0aDcp0jKvApP5cADIFY
 
I checked the group in the azure ad and it's not deleted it present there.
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