Fix fatal error:

new_gist_file.php

<?php
/*
Quick fix for this problem until I have the time to look for the cause.

"Fatal Error: Cannot redeclare class modTemplateVarInputRenderText...
...in core/model/modx/processors/element/tv/renders/mgr/input/text.class.php onl line 10"
*/

/**
 * @package modx
 * @subpackage processors.element.tv.renders.mgr.input
 */
if (! class_exists('modTemplateVarInputRenderText')) {
    class modTemplateVarInputRenderText extends modTemplateVarInputRender {
        public function getTemplate() {
            return 'element/tv/renders/input/textbox.tpl';
        }
    }
}
return 'modTemplateVarInputRenderText';

Did you ever find the cause of this @pepebe?

I have the same issue, and am also using this fix. No idea what the cause is however.