Help with Dynamic Values in textboxes

I'm trying to put dynamic values into text boxes. Normally I can type into the "How would you calculate this value" search bar and I'll see a dropdown of whatever matches. So in my experience it will normally appear as shown below:

It says "Ask a question about your data". But in my current situation, that "Ask a question ..." text isn't there and when I type anything in, instead of returning search cases, the text I type will be greyed out.

So I'm unable to put dynamic values into my textboxes.

The other place where perhaps the same underlying issue seems to appear is with the Q&A visual. Previous both dynamic values and Q&A worked successfully, though now Q&A gives:

I haven't changed any settings and the dynamic values and Q&A functions both work in other PBI files. So maybe something is up with my data? Again, I don't recall having changed it in any way to cause this.

Does anyone know of a fix for either or both of these issues?

Thanks