We are periodically seeing these PHP notices in the WP admin - refreshing the page will generally make it go away but they come back after a few page refreshes.
Notice</b>: session_start(): ps_files_cleanup_dir: opendir(C:\Windows\TEMP) failed: No such file or directory (2) in <b>D:\...\plugins\pro-sites\pro-sites-files\lib\ProSites\Helper\Session.php</b> on line <b>29</b>
Also, when accessing the theme customizer this notice shows at the top of the theme preview.
Notice: Undefined index: theme in D:\...\plugins\pro-sites\pro-sites-files\modules\premium-themes.php on line 375
It's not theme specific -- it happens even with the default twenty fifteen theme. I've tried disabling other plugins to see if that made a difference but no joy.
Can you advise on how we can clear these? I'm aware that disabling debug will cause them to go away but I can't do that in my development environment as it stops me from seeing other issues.