I am encountering an absurd situation when using Oracle Apex. When I log into my apllication, select a page from the list of pages and click the Play button (save and run page) I get a normal output in a new tab showing me the page.

The problem starts when I decide to change the page or any of the pages from the list. After making a change I am unable to save it. I get a message: Your session has ended. If I want to save the change I have to reload the page, log into Apex again, select the desired page and make the change.

It is totally weird, because before today this did not happen and Apex was able to save changes and run the page without having to log into again.

I tried to configure session timeout or google this, but nothing helped. I will appreciate every suggestion.