I am having the same problem, indeed! I created a vagrant machine with PHP 7.1 and it stopped working! it was working with PHP 7.0, therefore I assume it is some incompatibility with PHP 7.1.
Moreover, and that is strange, I can have access to the page if I delete "parent::" at line 250, and I put it again after the refresh!
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Reuploading adminer i get the same error on line 250
I am having the same problem, indeed! I created a vagrant machine with PHP 7.1 and it stopped working! it was working with PHP 7.0, therefore I assume it is some incompatibility with PHP 7.1.
Moreover, and that is strange, I can have access to the page if I delete "parent::" at line 250, and I put it again after the refresh!
here's my config.yaml
Couldn't reproduce in PHP 7.1.1.