错误：“的延迟绑定失败（您是否忘记继承所需的模块）？”

I am having an issue with my GWT project. The project compiles, but when I try to debug as Web Application, I get the following errors. I am new to this so any guidance on how I might troubleshoot this would be appreciated. Please let me know if you need to see my code, I am happy to post it.I am having an issue with my GWT project. The p