Thanks for pom @clouless
I tried your pom with minor modifications, where you did not provide data with one simple class, unfortunately the application on 8.8 does not start at all 
Can someone from Atlassian tell us how to run a simple application on version 8.8?
UPDATE
After a few hours of playing around with the issue while building the app to version 8.8, I came to the conclusion that the Atlassian SDK simply doesn’t work. My plug-in compiled correctly during the standard process using atlas-package, but when uploading it to the environment (Quick Reload) via the atlas-run command, an OSGI problem occurred every time.
After switching to Confluence installed via a file (ZIP, TAR, BIN) with a separate PSQL database, the application behaves correctly and the same compiled JAR file works correctly.
Dear Atlassian, can you officially fix the SDK and describe what steps should be taken and what versions should be used to make the development of applications using the SDK possible for Confluence 8.8 (and higher)?