Hi Mathilda1,
It's a bit odd that the pay slips aren't sending, especially since it worked before and nothing's changed. But no worries, I've run a script on your file to help sort it out. Now, go ahead and put through a dummy paycheque, then delete it. After that, try resending the pay slips. Also, double-check that none of the recipients have firewall settings blocking the emails. If the pay slips still aren't sending, you'll need to reach out to our support team using one of the various support options available here for further look into what may be causing the issue.
Cheers,
Princess