Cant install Opt-In Free 5.7 on Concrete5Browser Info Environment
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One of the websites uses the STUCCO theme (C5 - v 126.96.36.199), and and the other one uses a parallax theme "Long Story Short - Paid version" (C5 - v 188.8.131.52) and it would not install on either one of them. Thank you.
That's a problem with C5, it works fine if you don't scratch the surface, but when you're trying to do something moderately advanced, it's a pain. Still it's better than most other CMS's...