Help? Outlook error: error reading the rules from server. Format of server rules not recognised.

Job ID: 34577596

Budget: $10 – $50 AUD

Hoping for a quick fix here.

I have rules in my desktop Outlook program and the 365 web version. I don't remember making any changes in either, but now I get this message (uploaded screenshot) every day, many times a day - within my Outlook desktop program.