405

TypeError: WikiPlugin_Helper::resultString(): Return value must be of type string, null returned in /home/tiki-copydoc/public_html/lib/core/WikiPlugin/Helper.php:61
Stack trace:
#0 /home/tiki-copydoc/public_html/lib/core/Tracker/Field/Files.php(476): WikiPlugin_Helper::resultString()
#1 /home/tiki-copydoc/public_html/lib/trackers/trackerlib.php(6558): Tracker_Field_Files->renderOutput()
#2 /home/tiki-copydoc/public_html/lib/smarty_tiki/FunctionHandler/TrackerOutput.php(18): TrackerLib->field_render_value()
#3 /home/tiki-copydoc/public_html/temp/templates_c/en_social^890c05cbddcbe022cdfa099e9b70551a0e8e50da_0.file_layout_flat.tpl.php(72): SmartyTiki\FunctionHandler\TrackerOutput->handle()
#4 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template/GeneratedPhpFile.php(111): content_67cfd9d3e8c2e9_69339400()
#5 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template/Compiled.php(110): Smarty\Template\GeneratedPhpFile->getRenderedTemplateCode()
#6 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template.php(180): Smarty\Template\Compiled->render()
#7 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template.php(655): Smarty\Template->render()
#8 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template.php(589): Smarty\Template->_execute()
#9 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Smarty.php(2121): Smarty\Template->fetch()
#10 /home/tiki-copydoc/public_html/lib/init/smarty.php(277): Smarty\Smarty->fetch()
#11 /home/tiki-copydoc/public_html/lib/smarty_tiki/FunctionHandler/TrackerFields.php(179): Smarty_Tiki->fetch()
#12 /home/tiki-copydoc/public_html/temp/templates_c/en_social^ccd7d08ef9e9e78274ecfc29ba8830e57c174065_0.file_tiki-view_tracker_item.tpl.php(313): SmartyTiki\FunctionHandler\TrackerFields->handle()
#13 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template/GeneratedPhpFile.php(111): content_67cfd9d3e56389_35889883()
#14 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template/Compiled.php(110): Smarty\Template\GeneratedPhpFile->getRenderedTemplateCode()
#15 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template.php(180): Smarty\Template\Compiled->render()
#16 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template.php(655): Smarty\Template->render()
#17 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Template.php(589): Smarty\Template->_execute()
#18 /home/tiki-copydoc/public_html/vendor_bundled/vendor/smarty/smarty/src/Smarty.php(2121): Smarty\Template->fetch()
#19 /home/tiki-copydoc/public_html/lib/init/smarty.php(277): Smarty\Smarty->fetch()
#20 /home/tiki-copydoc/public_html/lib/init/smarty.php(525): Smarty_Tiki->fetch()
#21 /home/tiki-copydoc/public_html/lib/init/smarty.php(462): Smarty_Tiki->assign_layout_sections()
#22 /home/tiki-copydoc/public_html/tiki-view_tracker_item.php(1013): Smarty_Tiki->display()
#23 /home/tiki-copydoc/public_html/route.php(373): include('...')
#24 {main}