When I was trying to save and modify a cloned project today, en error message popped out (“Unprocessable Entity”). I tried to log in and out of the account, and this error remains, so that I could not save any changes to my project. I have done similar things before (cloning & modifying and saving the cloned experiment), and the experiments were running well. May I ask what may be the problem?
I am sorry you are experiencing issues cloning and saving your project. May I ask what the slug of your project is (the 6 characters at the end of the demonstration link) and whether you still encounter this problem with this and/or other projects?
It looks like the problem has to do with the project’s name being too long. Ironically that very problem prevents you from renaming the cloned copy of the project, because it requires creating a new project with a long name before renaming it…
I’ll fix this and update the farm soon, but in the meantime you can try renaming the original project with a shorter name, just make sure that you use fewer than 45 characters (the overall limit is 50 characters, and cloned projects automatically add “_copy” at the end, which uses 5 characters)