Libreoffice writer (7.6.4.1) keeps crashing

For the past few days, LO writer (7.6.4.1) has been crashing whenever I try to ‘save as’, I’m using Nixos. I’ve set up a new user profile and it seems to work fine, so my guess is that one of my config files is corrupt. I’ve tried deleting the libreoffice directory file in /home/xxx/.config but it doesn’t fix it. Are there any other config files I need to wipe, or anything else I can do? Thanks.

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