Is that truly a "new save"? I have not run across an issue with crashing in shops with a completely new save since the last major update. You are crashing and it's not letting you in the shops at all? I tried to use an old save, and it crashes in shops. I am not the Dev!
I was about to ask what logicalChase said. Saves between versions tend to have a few issues. I'm currently working on a way to export and reimport saves in order to fix that, a lot of major issues come from saves between versions. I apologize for the inconvenience, I'm working my best to fix it on the next versions!
aaaand now the shops are frozen again, maybe it hates even-numbered levels
edit: still frozen at level 23
edit edit: and now working again after I sold off my loot, maybe the amount of gold effects things somehow?
edit edit edit: frozen again after nothing at all changed, I give up. it's web gremlims or something, idk