Lightroom Crash on Export

Hi.

Hoping someone can help as I'm at a loss with .

For a week or two now, I cannot export photos on lightroom.

Sometimes I can export a batch / single photo during an export, other times I cannot.
If I get lucky and export a batch / single, the next time I try to export - lightroom just crashes, sometimes presenting me with an error message and other times not.

I have tried all the routine tips and tricks and have been on countless remote sessions with Adobe staff who loop me around the same troubleshooting steps. 

Is there anything anyone else knows that may help me resolve these issues... literally anything. 

Kind regards

Luke