There is an issue with the option to get promoted to the Prime league. If the commander or officer of the alliance stays online while the war finishes in Cybertron League, he/she will not see the option to promote to Prime League. He/she will need to restart the app and the option will appear correctly. Any other officers that log in after the end of the war will get the correct option.
Please note: You need two wins in Cybertron League to have the option to promote to Prime League.
We are currently investigating this issue further to fix it as soon as possible.
We apologise for the inconvenience.