I've gotten that one on occasion when creating a new character from scratch. It helps when the "Character name" field matches something in the first line of the "Character description/personality/instruction/role". For example. "Jane" in the character name field, and in the description I have:

Jane Anne Doe:

Fullname: Jane Anne Doe
Nicknames: Jane (preferred), Janet, Anne, Annie (she hates this one)

etc.

Usually though I only get that error on the very first run of a newly created character. Then it vanishes after first use.

Yeah same here. AI-character-chat is sloooooow or times out. My guess is that there might be a network attack of some kind going on? Unless someone made a tweak somewhere and it broke.

Same here, on several occasions... and now scientific formulae too? (I didn't understand it an didn't keep the log) It recently brought up a mixture of sodium hydroxide and salt in solution when it had nothing at all to do with the topic at hand. Unless it was trying to say "they literally don't mix" in a weird way.

Yeah I've seen random Chinese characters appear too.