Conflicts with other Plugins

Hi,

I have Simple cache installed and I am experiencing conflicts with other plugins.

1. Wordfence.

Regular visitors are getting access restricted page and are unable to visit the site.

I even get the message when I try to log in while my IP is whitelisted in Wordfene.
I contacted Wordfence developers and they investigated.

Said this conflict has been there previously and is due to a cache error.

2. Ultimate member.
There is another error where visitors are unable to click on links in the member box.

Simple cache is currently disabled due to the fact that some visitors are blocked.