Thanks so much, works perfectly again!
The problem seems to be the compatibility with Upsolution Core. The strange thing is that I also manage another website that has both the mega addons and upsolution core, where it works without any problems.
Thanks for the fast responds.
I tried and that does work. I can also add the heading element in the footer, I can just not change anything about it due to not being able to ‘save changing’.
I have already tried updating both the theme and all plugins, but nothing helps.