Texmaths basic runtime error

[joneall]

Using Libreoffice 7.3.7.2 with TexMaths on KDE Neon 5.27.

When I write a latex formula in a Writer document and then click on the pi symbol, TexMaths converts the formula nicely. However, when I open TexMaths directly with the pi symbol, either to add a new formula or edit an already-existing one, TexMaths displays a message saying

BASIC runtime error.
An exception occurred
Type: com.sun.star.lang.WrappedTargetRuntimeException
Message:./scripting/source/digprov/digprov.css:589

So it seems to occur whenever LO wants to display something, even its own config.

This is a big problem for me, as I have several documents about quantum physics with lots of formulae in them.