title: Error Opening Project: the R project cannot be open
body: <p>When I try to open a R project (.Rproj file), I cannot and this error message appears:</p>
  <p>Project 'abc.Rproj' could not be opened. The project file did not include a version attribute (it may have been created by a more recent version of RStudio).</p>
  <p>Can anyone help me and tell me how I can fix the issue ?</p>