News Extension with Bootstrap GridColumnItem::getBackendLayout()

[Pestichen]

Bug Report

Current Behavior
After installing and inserting the Plugin on a Page everything works fine so far.
But when i try to edit this page in Backend will lead to the following error.

https://prnt.sc/s3rlbb
Call to undefined method GridColumnItem::getBackendLayout()

This error only happens on pages with news Plugin in it.

ErrorText from Log:

Core: Exception handler (WEB): Uncaught TYPO3 Exception: Call to undefined method >TYPO3\CMS\Backend\View\BackendLayout\Grid\GridColumnItem::getBackendLayout() | Error >thrown in file >***/public/typo3/sysext/backend/Classes/Preview/Standar>dContentPreviewRenderer.php in line 172. Requested URL: ***/index.php?>route=%%2Fmodule%%2Fweb%%2Flayout&token=--AnonymizedToken--&id=11

Expected behavior/output
Pages with this Plugin should be editable.

Environment

• TYPO3 version(s): 10.4.0
• news version: ["georgringer/news": "^8.0"]
• Is your TYPO3 installation set up with Composer (Composer Mode): yes
• OS: CentOS 8.1

Possible Solution

Additional context
My Typo-Project uses the twitter Bootstrap Package

[MatthiasPeltzer]

Hi there. I got the same error.

Page in pageview editing not working, in listmode it works. Has a problem with backendlayouts.

Environment
TYPO3 version(s): 10.4.0
Is your TYPO3 installation set up with Composer (Composer Mode): no
OS: CentOS 7
PHP: php 7.3
Additional Context: I am just using backend layouts and FluidStyledContent

[Pestichen]

Good to know,
that the same error happens without twitter package.
Had already considered deleting all templates so far. :-/

[georgringer]

This is an issue in the core fixed with https://review.typo3.org/c/Packages/TYPO3.CMS/+/64297

please just disable the fluid page template in the install tool

[Pestichen]

Work like a charm

THX