I am getting the following error when trying to made adjustments to the custom font chosen for the bootstrap theme - 

'Sorry, we found some problems with the information you entered. We've highlighted the relevant sections.
Please check and resubmit.'

It is not highlighting anything, and the only thing i was trying to adjust was the font from the drop-down.

I found a way round this, but i then wanted to add some text to the footer but am getting the same error when i try and save.

I cannot see what might be wrong