[Plugin: Alpha Cache] Homepage cache problem

eventually gave up as some struggling, –> my homepage and some of the links cannot be opened after re-activating the plugin …

This is a good plugin though b/c it is easy. Hope it works with someone else’s wp.

After activating the plugin, the backend appears no conflict. But all the front end pages failed.

Server error
The website encountered an error while retrieving http://tax1on1.org/. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this webpage later.
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.

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Thx.

Backend no problem after installing it. In frontend, all pages error. I know I have a short rss toolbar php code plus jquery (top of each page); and this toolbar conflicts with almost all RSS plugins; but I am sure if it has the same conflicts with Alpha.

Screenshots are attached below.