Invalid Entry keeps popping up

Invalid Entry keeps popping up

Suddenly, after using ZOHO Creator for several years on 10 databases, I am beginning to get "Invalid Entry. Please correct and submit again".  This occurs in a RTF field.  I noticed in one instance, I can save a record that has 3 entries in that field, but if I add a 4th, I get the error message. Not just this record but several similar records.
  1. IX-B
  2. Captured 1944
  3. After the war, attended Northwestern U. and started a governmental affairs/lobbying firm.  Working there at age 80.  THIS WORKS

4.  After the war, studied at Northwestern U. In 1958 started a governmental affairs/lobbying firm where he still works at age 80 (2005). Gave me a copy of "Given Up for Dead" (Jim West)  Adding this in normal fashion, gets me the "Invalid Entry" message.

I have numerous records with even more lines of data and they work fine.

database located at   http://tinyurl.com/106th-Roster