After a couple of weeks of non activity I came back to where I left off. But now I am not able to verify tasks and I also don't see the Condition bar when I enter a specific task.
Currently, we examine the possible reasons why this issue arises. But for the moment we can offer you the following solution.
Find the file CodeGymPlugin.properties in the project tree at the left sidebar of IJ IDEA and write the next command:
codegym.html.disable=true
Then press the combination Ctrl+S and restart the IDEA.