Thx :)
After test, new error:
In template_modifications.xml, replace:
style="background-image: url('{{ link($thread.Forum.xt_cover_img_path) }}')"
By
style="background-image: url('{{ ($thread.Forum.xt_cover_img_path) }}')"
Just to be sure, what is the correct code?
<xf:if is="{$xf.options.xfk_toolsbar_block2_link}">
or
<xf:if is="$xf.options.xfk_toolsbar_block2_link">
and
<xf:if is="{$xf.options.xfk_toolsbar_alert_enable_block2} && !{$_COOKIE.block2}">
or
<xf:if...