This morning there was a malicious user who appears to have written a script to reset many people's passwords. If your account was targeted, you may have received many (I received over 1000) emails stating what your new password is. We will be migrating to another password reset scheme but, in the meantime, password resets have been disabled.
If your account was targeted, here are a couple things to know:
The emails themselves are legitimate (they were just initiated by a malicious user using a script) so the last email you received should be your last password
If you cannot login using the last password (eg, if you deleted the emails), feel free to DM or email me and I can set you up with a temporary password so you can log back into your account
I would like echo the sentiment from the Snap! team; it is disappointing when users try to cause problems for the NetsBlox community as then the NetsBlox team needs to spend more time addressing issues like these rather than working on cool new features, projects, and integrations for the platform.
They might not be fully supported. I will need to double-check when they were added. (We should be up to date with version 6.4 or so.)
What would you like to load in an iframe? Are you trying to load something like the CODAP library (should be available in the community libraries)?
Unfortunately, I still don't follow. Are you trying to open the assignments from here? If so, I would recommend downloading the xml file from the corresponding assignment directory (this one is an example) and then importing it into NetsBlox using the "Import..." menu item from the file dropdown.
If that doesn't work (and is in fact what you are trying to do), feel free to post screenshots to help show the error you are encountering!