I have run into this problem when upgrading from 3.2 to 3.3 without being able to have it solved.
Eventually I restored the mysql moodle database and moodledata from my last running 3.2 installation and started a fresh install with the latest 3.2. Again, there were a few plugins to be upgraded, among these question type plugin "stack". This plugin and all other plugins upgrade fine, but "stack" depends on three further plugins which cause this being stuck on the plugins check page:
The "new version" numbers are in fact the version numbers of the newest plugin versions on the plugin repositories, the "current version" numbers are not available any more. The "required" version numbers seem pretty old to me. I have no idea how to proceed. All three plugins are tagged to be compatible with 2.7 up to 3.3.
Thanks in advance!