There are a few things you can do if the game will not load initially:
1. Press back on your browser and try to login again.
2. Update your Browser version.
3. Clear your Browser cache.
4. Do not open new browser tabs while you are playing FoE, as the processing priority from Foe will be demoted by the browser.
5. Make sure your browser add-ons are not conflicting with FoE.
One of there suggestions should solve your problem. Usually step 3, Clearing your browser cache will fix the issue. The browser cache stores files locally so that websites can be loaded faster. It is often the case that these files can become out of date, for example when something in the game code changes. For this reason, most simple problems can be cured by clearing your browsers cache.
I hope this helps.