WAF reverse proxy with not working

Hello,

once enebaled the following option reverse proxy does not work anymore.

Cookie signing
URLHardening

tailf /log/reverseproxy.log

[Mon Feb 06 22:15:41.552601 2023] [core:warn] [pid 13179:tid 140605555216064] AH00111: Config variable ${URLHardening_HTTP_Hostname} is not defined
[Mon Feb 06 22:15:41.552651 2023] [core:warn] [pid 13179:tid 140605555216064] AH00111: Config variable ${URLHardening_HTTP_Hostname} is not defined
AH00112: Warning: DocumentRoot [/sdisk/waffiles/{removed for privavy}] does not exist
AH00526: Syntax error on line 100 of /cfs/waf/reverseproxy.conf:
Invalid encrypted key

even without anything in web protection policy I'm getting

AH00112: Warning: DocumentRoot [/sdisk/waffiles/{removed for privavy}] does not exist

but not the Syntax error on line 100 of /cfs/waf/reverseproxy.conf anymore