I know Chrome isn’t supported but thought I would mention this for other users and maybe IBM could fix.
When you compose and try to send an email you get a box from Chrome about a bad URL. And the message is never sent.
This box normally (in other browsers) would be a message whether to save the message after sending.
The workaround to avoid the failure: Change your preferences in iNotes to “Always keep a copy” or “Don’t keep a copy” instead of “Always prompt”. This prevents the prompt and the issue.