Germany
Lewis of Bavaria
Upon Henry's death, two candidates again emerged: Frederick of Austria and Lewis of Bavaria. John of Bohemia was still too young to succeed his father
Each was elected, but by different elements of the seven electors. Both were crowned on the same day: Frederick at Bonn by the Archbishop of Cologne and Lewis at Aix-la-Chapelle by the Archbishop of Mainz. Frederick was crowned by the right bishop, for the Archbishop of Cologne was the one who traditionally crowned the King of Germany, but Bonn was not the traditional place for the German coronation. Lewis was crowned in the right city—
Aix-la-Chapelle being Charlemagne's city—but by the wrong bishop. Both sides claimed their election was the only one
valid and that their coronation was the only one valid.
They might have appealed to the papacy, but there was no pope at the moment, Clement having died and new the pope not yet elected. The result was civil war in Germany that lasted for eight years, undoing much of what Henry of Luxemburg had begun.
Lewis eventually won the contest.
Pope John XXII wanted the conflict to continue. He was pro-French and very ambitious. He enjoyed exercising imperial powers in Italy, which he claimed by right of the imperial vacancy, and he ordered Lewis to stop calling himself King of the Romans. Lewis refused, and so Pope John excommunicated Lewis in 1324. The German king spent the rest of his reign trying to fend off various French combinations against him and trying to reassert some sort of influence again in Italy.