I'm replacing the business logic in an existing SharePoint 2013 project. When I deploy the new code I get the error on the subject of a message like was not expected. The markup code is the same before and the old version works.
I tried some solution found on the internet but I cannot resolve this issue.
I noticed that the first tag in the page is a link type, I commented it and the error changed with the second tag in the page.
I'm replacing the existing business logic using Entity Framework, hope it helps