Adding a Bitmap layer crashes Harmony 17

I have been using Toon Boom Harmony Premium Silver 17 successfully for almost a year, and just today this started happening.

Every time I add a new layer, I have the option to change several aspects from vector based to bitmap. If I create a new layer with ‘Line Art’ selected as bitmap, this reliably crashes the program when I select ‘Add and Close.’ Only the Line Art option does this.

I am perplexed by this and looking around online I can’t seem to find anyone else with the same issue. I can provide more info if anyone needs, some info and help would be excellent, thanks.

P.S. This is on a Mac Book pro 2015, on the latest Big Sur MacOS