title: Unable to log-in using PL/SQL Developer
body: <p>I have problem with logging into my database using Pl/SQL Developer. All connection parameters are defined in TNSNAMES.ORA and work perfectly with SQL Developer.</p>
  
  <p>Unfortunately, when I try to connect using PL/SQL Developer, I am receiving a message with no content. I am using version 9.0.6.1665.</p>
  
  <p>Is this a known issue and what might I be doing wrong?</p>
  
  <p>Here is image of this strange error:</p>
  
  <p><img src="https://i.stack.imgur.com/lxBoE.jpg" alt="enter image description here"></p>