occasionally the above error occurs and oddly enough the IP-address mentioned in web application firewall /
security exception log is always the IP of the web-server the website is hosted. I can't explain the relationship.
I found out that the internet connection failed at some days for a short time in the night. I don't know if there is a context with my problem.
As a temporary solution I defined the web-server IP-address in Administor IP Whitelist.
Would you please help. Thank you.
Manfred