There shouldn’t be a limit on the number of email recipients.
Can you post the error log that corresponds to the problem?
- Go to “Developer” > “Toggle Developer Tools”
- Chose the “Console” tab
- Press “Clear Console” (Ctrl + L)
- Reproduce the Issue
- Do a right click inside the console and click “Save as”
- Clear any personal information from the debug file that you now have created
- Attach the file here.