Hi, I had the same issue although I don't use errai on the project. Although I have a dependency on gson in project's pom.xml file (current version was 2.2.2).
After updating the gson lib version to 2.6.2 the superDevMode is working now. Thank you, Alex. -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
