Coverage problem with Spring Boot

After managing to run tests with Spring Boot i am now having an issue that HTML files generated by Coverage plugin are not loadable due to next errors:

jquery.js Failed to load resource: net::ERR_FILE_NOT_FOUND 
bpmn-navigated-viewer.js Failed to load resource: net::ERR_FILE_NOT_FOUND
hello_process1.html:92 Uncaught TypeError: NavigatedViewer is not a constructor

Did anyone had issue like this ?