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Hi Rajendra, 

 

Few things here to try in addition to tobiasdigital's suggestions:

1. Check the firewall settings if (as mentioned) an upgrade has been done the http / https settings are one which I faced during upgrade config

 

2. Sometimes vpn is impacting as well, if your vpn is down or not been whitelisted it too will cause the above error

 

3. try error clear navigate to C:\Users\"ENTER USER"\AppData\Roaming\Neolane\NL_5 and you will see the folder "nlclient" and the file "nlclient_cnx.xml" do not delete these files however if you see any other files for example:

nlclient-config-u00000000000000000000000000000001050FE3FC

nlclient-config-uFE80000000000000D1315F55247F81FD0014BB9E

nlclient-config-uFE80000000000000158F8B4EB4C4CBF614501502

delete these then restart campaign should also work.

 

Wish you all the best with the issue.