changing protected content text

I clicked on Membership 2 >> Settings >> Protection Messages

Because I want to change the protection message, which is currently set to the following by default:

The content you are trying to access is only available to members. Sorry.

So I changed it in the settings, but when I try to access the protected content, I still get the same, default protection message, as if I did not make any changes, although on the back-end it indicates that I have successfully changed the message.

Please help. Thanks.

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