Occasionally an error may appear in Cubit if there was an issue with the content in your clipboard (it is due to the data you may have previously copied).
Please try the following steps to try and resolve the issue.
1. Click on Close to close the error in Cubit
2. Start Windows Notepad and press <CTRL>+<V> to paste the buffer contents
3. Close notepad but do not save.
4. Re-open Cubit and try again
Alternately you can restart the device to overcome the problem.