Error on clicking Page Setup of Calendar section in any workplace (For Example Sales)
In the workplace setup, open any app that has a calendar section added. On clicking the "Page Setup" button, I get the below error. 
It looks like it is an issue with native Creatio, as it gets replicated with any on-premise Creatio or trial Creatio site.
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Hello Manoj ,
Thank you for reaching out. The issue you’re encountering typically occurs when a section has been added to the workplace but was subsequently deleted.
Try to search this schema in the configuration but the UId from the error. If you won't be able to find it, you need to restore this page, or create a new one by setting it as an edit page in the SysModule system table:
update "SysModule" set "SectionSchemaUId = '*New SchemaUId*' where "SectionSchemaUId" = '35874ead-9362-4582-a3bd-b8b6724b55c2'
If you require further assistance with executing the scripts or troubleshooting, please feel free to create a support case and provide the relevant scripts. Our team will be happy to assist you.
Have a great day!