What are these ip:s

[Havouza]

Hi!
The Apache error log is flooded with the same error when traffic comes from a group of ip:s 172.68.189.104:44920] All from 172.168.x.x and different port numbers.

Always the same error

Trying to get property of non-object in /home/jv74/public_html/vendor/smarty/smarty/libs/sysplugins/smarty_internal_templatebase.php(157) : eval()'d code on line 474

Anyone knows what this can be?
Shop works as it seems without any problem

[Factor]

https://www.whatismyip.com/ip-whois-lookup/

NetRange:       172.64.0.0 - 172.71.255.255
CIDR:           172.64.0.0/13
NetName:        CLOUDFLARENET
NetHandle:      NET-172-64-0-0-1
Parent:         NET172 (NET-172-0-0-0-0)
NetType:        Direct Assignment
OriginAS:       AS13335
Organization:   Cloudflare, Inc. (CLOUD14)

[haylau]

Probably robots just trawling the site to index it. YO ucan use the bad bot module to kill them if they are not following the rules. 

But could also be more invasive. There are always "hacking" bots out there every minute of every day trying to find the looholes to let them in. If you have your own server - is it protected? For example we have CSF installed to help block these