I have around 15 hosts that I want to import through an XML file, when importing I get a blanc screen without any error message and unable to debug. (see attachment for screenshots)

To note:

• I deleted these hosts a hour before to get a fresh start with the new regexp I added.
• I also had this exact problem with the deletion of the hosts and needed to delete them one by one.

Solutions tried without result:

• Restarting all the services which zabbix uses (mariadb, php7, httpd, etc etc)
• Rebooting the server
• Different browser (Chrome instead of firefox)
• Cleaning all the browsers (which did fix a few problems I had earlier with zabbix)

A solution would be wonderful!