Michael,
Sorry that you are seeing problems with MyEclipse 2017 CI 1.
If you are including libraries to your project, then please ensure you have attached the source code as well from the project’s Java Build Path > Libraries, expand Libraries node and select ‘Source Attachment’ attribute.
If all your classes have sources set correctly, then click the ‘Edit Source Lookup Path’, browse to your project, add it and restart your web application. Alternatively, you can also add the sources to the Debug configuration. Switch to the Source Tab, click ‘Add’ and select the project.
Please also recheck if all the required dependencies are added to the project in the Deployment Assembly page.Right click on project -> Properties -> Deployment > Deployment Assembly.
Hope this helps. Please let us know how it works for you.
–Swapna
MyEclipse Support