The problem is not always obvious, for example the error message in relation to the function
unserialize(). If you look around the net to help you find countless search and few answers, because usually the problem lies in the source, in the passed value. But not always you can control it, especially in debugging helpers there are different contents.
To help some people who are seeking help, here are some solutions you can work with. Some are to be used only in conjunction with WordPress, because the function comes from the core. But there are similar things, of course, even without WP.
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