When using the following stack:

    "drupal/core": "8.3.1",
    "drupal/bootstrap": "3.3",
    "drupal/bootstrap_layouts": "5.x-dev",
    "drupal/page_manager": "4.0-beta1",

Nor "layout" nor "settings" are found in _bootstrap_layouts_preprocess_layout(). This is due to the fact that both those array keys are to be found under $variables['content'].

CommentFileSizeAuthor
#2 bootstrap_layouts-2872583.patch891 bytesademarco
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ademarco created an issue. See original summary.

ademarco’s picture

ademarco CreditAttribution: ademarco at Nuvole commented
FileSize
bootstrap_layouts-2872583.patch891 bytes
markhalliwell’s picture

markhalliwell
Primary language English
CreditAttribution: markhalliwell at Tag1 Consulting commented
Status: Active » Closed (duplicate)
Related issues: +#2871551: Problem to find template file, +#2862683: 'base hook' key prevents template suggestions from working

I was running into this as well. The problem is that template_preprocess_layout() isn't being invoked to provide these variables.

This is likely a dup of the related issues as one or both of these fix this issue because after running through this, I stopped getting this error.

markhalliwell’s picture

markhalliwell
Primary language English
CreditAttribution: markhalliwell at Tag1 Consulting commented
Related issues: +#2861840: Preprocess functions are not merged when a module registers a theme hook for a theme-provided template

Actually, this is likely the real core bug.