title: Apex: can't create new application
body: <p>Im using apex 19.1 and oracle 18c.</p>
  
  <p>few months ago we have upgraded our apex version from 18.2 to 19.1 After that we were able to create, copy pages/applications.</p>
  
  <p>recently we ran into a problem, we are not able anymore to create or even copy pages/applications.</p>
  
  <p>for example when I try to create new page, this error appears.</p>
  
  <p><a href="https://i.stack.imgur.com/ebaLS.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ebaLS.jpg" alt="enter image description here"></a></p>
  
  <p>when try to copy page</p>
  
  <p><a href="https://i.stack.imgur.com/1Ptja.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1Ptja.jpg" alt="enter image description here"></a></p>
  
  <p>and finally when I try to create a new app. the application will be created but it has only a global page, and this error appears::</p>
  
  <blockquote>
    <p>ORA-06508: PL/SQL: could not find program unit being called ORA-06512: at "APEX_190100.WWV_FLOW_CREATE_APP_V3", line 3686 ORA-06512: at "APEX_190100.WWV_FLOW_CREATE_APP_V3", line 3686 ORA-06512: at "APEX_190100.WWV_FLOW_CREATE_APP_V3", line 3762 ORA-06512: at "APEX_190100.WWV_FLOW_CREATE_APP_V3", line 4623 ORA-06512: at line 38</p>
  </blockquote>
  
  <p><a href="https://i.stack.imgur.com/tfgHS.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tfgHS.jpg" alt="or"></a></p>
  
  <p>any help would be appreciated.</p>