@HeadStand On 4.1.19.4 I've started to see this error:
Template store key: template_1_2fb293ac9742a1ebdf0f083ddddd13eb_content missing (newsletters, global, content)
Backtrace:
#0 /var/www/html/forum/system/Theme/Theme.php(756): IPS\_Log::log('Template store ...', 'template_store_...')
#1 /var/www/html/forum/applications/newsletters/extensions/newsletters/NewsletterContent/Core.php(246): IPS\_Theme->getTemplate('content', 'newsletters', 'global')
#2 /var/www/html/forum/applications/newsletters/sources/Newsletter/Content.php(262): IPS\newsletters\extensions\newsletters\NewsletterContent\_Core->htmlTemplate()
#3 /var/www/html/forum/applications/newsletters/sources/Newsletter/Newsletter.php(491): IPS\newsletters\Newsletter\_Content->build('html', Array)
#4 /var/www/html/forum/applications/newsletters/sources/Newsletter/Newsletter.php(566): IPS\newsletters\_Newsletter->buildContent('html', Array)
#5 /var/www/html/forum/applications/newsletters/tasks/PublishNewsletters.php(65): IPS\newsletters\_Newsletter->publish()
#6 /var/www/html/forum/system/Task/Task.php(249): IPS\newsletters\tasks\_PublishNewsletters->execute()
#7 /var/www/html/forum/system/Task/Task.php(218): IPS\_Task->run()
#8 /var/www/html/forum/system/Dispatcher/Standard.php(306): IPS\_Task->runAndLog()
#9 [internal function]: IPS\Dispatcher\_Standard->__destruct()
#10 {main}
Is this a theme error? If so, how do I work out which theme?