I have installed Oracle Database Express Edition 11g and form developer 12c. Until recently, there was no need to develop forms for https://lotoplay.com.ua/. Today I tried to connect the database to the form and received an error
"tns could not resolve the connect identifier specified"
Google and your forum gave a lot of answers, but I still could not figure out what was happening. Tell me how to solve the problem and apologize in advance if I did not find through the search the same topic on the forum.