Overwriting a Themes-GridElements Fluid-Template
For overwriting a Themes-GridElements Fluid-Template create a Setup-TypoScript for modifying the template path. The following snippet will do that for the accordion template.
File: theme_bootstrap_child/Configuration/TypoScript/Library/plugin.themes_gridelements.setupts
# Overwrite the accordion template lib.gridelements.accordion.cObject.file = EXT:theme_bootstrap_child/Resources/Private/Partials/Elements/Accordion/Accordion.html tt_content.gridelements_pi1.20.10.setup.accordion < lib.gridelements.accordion
Finally copy the source template from EXT:themes_gridelements/Resources/Private/Templates/Elements/Accordion.html into the new directory EXT:theme_bootstrap_child/Resources/Private/Partials/Elements/Accordion/Accordion.html.