Steven Zahm@ Deanna
After some testing on your site… and this is weird.
A short bio (or any field in Connections) with + will work (or seem to), longer text which include + in the text fail. As soon as they are removed there are no issues.
I can not replicate this, but I’m running a far newer version of Connections. So that could mean something though I’m not sure why it would.
The only other thing I can think of is that for some reason it is triggering a mod_sec PHP setting the web host has setup. I’m not certain that’s either because posts/pages can be created just fine with the same text whether or not + are in it. I would expect, unlist those were whitelisted, that the mod_sec rule would be triggered too.
When I get FTP access, I’ll take another look.
I also suggest asking your web host wy a form submission would trigger a 403 on your site with that content. Maybe they have some insight. I do doubt you will get a decent answer though, generally tech support can not answer such technical question (in my experience anyway).