You already had a new thread open (after posting in that old one): https://community.oracle.com/tech/apps-infra/discussion/4493301/an-error-occurred-while-writing-to-the-server-please-check-to-make-sure-you-have-entered-appropriat#latest

Close one of the 2 new and keep only a single one open.

When you have a question, like in this one, you should open a "question" and not a "discussion".