I don't know if it solved the problem, but there is no answer, so I answer.
In my opinion, what I used to do in the past seems to have changed some dependencies.
After seeing the missing EMF message, I accessed the Eclipse site and received the version of the emf package that caused the problem and installed it directly from S32DS.
Get the EMF-Updates-2.13 file from http://download.eclipse.org/modeling/emf/emf/builds/release/2.13/index.html
Select the compressed file downloaded from Install New Software -> Add -> Archive and install all EMF related files. So I solved this problem.
I hope you have good results too.