Uncaught TypeError: Cannot read properties

[lesliealanuk]

Hi there

As soon as I open the builder, I receive the following error:
Uncaught TypeError: Cannot read properties of undefined (reading 'value') on line #325 in https://xxxx/?ct_template=news&ct_builder=true&ct_inner=true&oxygen_iframe=true

I can't make sense of it and it seemed to come out of nowhere. Has anyone had a similar problem? It doesn't seem to affect the performance of the front end.