IdealPanda97 It seems that expired ES5 license is the reason for both the upgrade failing and for inability to run the Trains v0.15. The license is free but the ways to renew it are different between ES5 and ES6/7. For the ES5 the procedure is more complicated and described in the medium article that I sent earlier. In the attached thread another user has applied it and it solved the issue. The article describe 2 possible solutions: turning of the xpack when running Elastic and retrieving the new free license and installing it with curl. The second way is better since it will be good for both running the old docker and for the upgrade script. You have to do it only once for your existing ES5.