Reverence reverb not available in a dorico file

I have copied a score in Dorico (from scratch) two months ago. I just opened it to apply new stuff (fingering and l.v. ties) and while I was trying to export a mockup of that contemporary music, I noticed I could not access Reverence reverb settings. I mean it IS in the inserts, but when I click on the rounded e, nothing happens.
The strange thing is that I still can access it in other files. Can anyone send me a clue ? Should I send this file to Daniel ?

Or send it to me: u dot stoermer at steinberg dot de

It sounds like the file has got in a strange state. Can you try doing Apply Default Template to see if that fixes it?

Thank you Paul ! That solved the problem !