execution of request failed

I keep getting an “execution of request failed” syncing error. It looks like a lot of people have had this problem, with posts on it going back six years, and the mods keep suggesting the same fix: delete and then re-add your email account. I have done this, as well as uninstalled and reinstalled eM Client, but it keeps happening. I want to love eM Client, but even with v7.2 it keeps happening. Why is there no fix for this after 6 years?