Based on this change record: https://www.drupal.org/node/2966725

Render callbacks must be a closure or implement TrustedCallbackInterface or RenderElementInterface. The used render callback in #pre_render is deprecated and needs to be moved to a class.

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#2 3160651-2.patch2.5 KBflorianmuellerch

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fmueller_previon created an issue. See original summary.

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new2.5 KB

  • fmueller_previon committed 5ae97cf on 8.x-1.x
    Issue #3160651 by fmueller_previon: Pre Renderer must be instance of...
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Status: Active » Fixed

Status: Fixed » Closed (fixed)

Automatically closed - issue fixed for 2 weeks with no activity.