Go to preferences and change the skin to the default FM skn - clear cache and reload skin
If the issue goes away, the issue is the Custom Zeiland skin and you would have to contact the creator for a skin fix.
If the issue still is there, it's a game issue and should be looked at for sure
But i can say that after the winter update, there was an error in "most" custom skins, where the buttons would be missing, mostly while playing in germany
But without saying, i can almost guarantee that it's a custom skin issue