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I have a SmartForms form that has been working successfully. This has stopped working and no changes have been made to the form or template. The error given is
Unable to load template 'module_file_tpl:SmartForms;error.tpl' in 'content:right_column'
Trace:
#0 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_templatebase.php(216): Smarty_Internal_Template->render()
#1 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_templatebase.php(107): Smarty_Internal_TemplateBase->_execute()
#2 /var/www/clients/client2/web1/web/lib/classes/internal/class.CMS_Smarty_Template.php(20): Smarty_Internal_TemplateBase->fetch()
#3 /var/www/clients/client2/web1/web/modules/CMSMSExt/lib/class.XTModule.php(1101): CMS_Smarty_Template->fetch()
#4 /var/www/clients/client2/web1/web/modules/SmartForms/action.default.php(142): CMSMSExt\XTModule->DisplayErrorMessage()
#5 /var/www/clients/client2/web1/web/lib/classes/class.CMSModule.php(1403): include('/var/www/client...')
#6 /var/www/clients/client2/web1/web/modules/CMSMSExt/lib/class.XTModule.php(728): CMSModule->DoAction()
#7 /var/www/clients/client2/web1/web/lib/classes/class.CMSModule.php(1479): CMSMSExt\XTModule->DoAction()
#8 /var/www/clients/client2/web1/web/lib/module.functions.php(106): CMSModule->DoActionBase()
#9 /var/www/clients/client2/web1/web/lib/classes/class.CMSModule.php(253): cms_module_plugin()
#10 /var/www/clients/client2/web1/web/tmp/templates_c/125right_column^1a7f60074487f8a3cbe5706d466720e687b6d3f9_0.content.right_column.php(26): CMSModule::function_plugin()
#11 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_template_resource_base.php(128): content_63f4d72e7f5fd1_96508209()
#12 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_template_compiled.php(172): Smarty_Template_Resource_Base->getRenderedTemplateCode()
#13 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_template.php(206): Smarty_Template_Compiled->render()
#14 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_templatebase.php(216): Smarty_Internal_Template->render()
#15 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_templatebase.php(107): Smarty_Internal_TemplateBase->_execute()
#16 /var/www/clients/client2/web1/web/lib/classes/internal/class.CMS_Smarty_Template.php(20): Smarty_Internal_TemplateBase->fetch()
#17 /var/www/clients/client2/web1/web/lib/classes/internal/class.CMS_Content_Block.php(316): CMS_Smarty_Template->fetch()
#18 /var/www/clients/client2/web1/web/tmp/templates_c/650460e1799b95e04d87ae3036cb2c53a06b88df_0.tpl_body.14.php(62): CMS_Content_Block::smarty_internal_fetch_contentblock()
#19 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_template_resource_base.php(128): content_63f4d72e7d7d29_04887409()
#20 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_template_compiled.php(172): Smarty_Template_Resource_Base->getRenderedTemplateCode()
#21 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_template.php(206): Smarty_Template_Compiled->render()
#22 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_templatebase.php(216): Smarty_Internal_Template->render()
#23 /var/www/clients/client2/web1/web/lib/smarty/sysplugins/smarty_internal_templatebase.php(107): Smarty_Internal_TemplateBase->_execute()
#24 /var/www/clients/client2/web1/web/lib/classes/internal/class.CMS_Smarty_Template.php(20): Smarty_Internal_TemplateBase->fetch()
#25 /var/www/clients/client2/web1/web/index.php(160): CMS_Smarty_Template->fetch()
#26 {main}

CMSMS is 2.2.16 and SmartForms is 2.0.0

Any ideas of what has gone wrong and how to fix it please?