Welcome to the Community, @Kate Hills!
Ah, it looks like this error has come up before in the Community:
There’s a bug report that’s mentioned on that topic so I’ve gone ahead and added you to the list of users being affected by it. I can’t make any promises as to when it will be resolved by but we’ll definitely send you an email notification the moment it gets fixed.
Since this is already being discussed in another topic I’m going to close out this post so that we can keep track of all interested folks in one place. For anyone who comes across this and wants to be added to the list of affected users, please reach out on the main topic for this bug directly. I’d also recommend subscribing to that topic to be kept informed of any news or workarounds shared there!