coming back to something reported by @jmw253 on the marketplace:
Error: Class 'IPS\tfrocketchat\widgets\Exception' not found (0)
#0 C:\inetpub\wwwroot\applications\tfrocketchat\widgets\tfRocketChatWhosOnline.php(167): IPS\tfrocketchat\widgets\_tfRocketChatWhosOnline->readJsonFromUrl('https://chat.si...', Array, Array)
#1 C:\inetpub\wwwroot\system\Widget\Widget.php(731): IPS\tfrocketchat\widgets\_tfRocketChatWhosOnline->render()
#2 C:\inetpub\wwwroot\uploads\template_3_94a9d7649fb9cdbfc784d3516e61a717_global.php(14808): IPS\_Widget->__toString()
#3 C:\inetpub\wwwroot\system\Theme\SandboxedTemplate.php(56): IPS\Theme\Cache\class_core_front_global->widgetContainer('sidebar', 'vertical')
#4 C:\inetpub\wwwroot\uploads\template_3_94a9d7649fb9cdbfc784d3516e61a717_global.php(12460): IPS\Theme\_SandboxedTemplate->__call('widgetContainer', Array)
#5 C:\inetpub\wwwroot\system\Theme\SandboxedTemplate.php(56): IPS\Theme\Cache\class_core_front_global->sidebar('right')
#6 C:\inetpub\wwwroot\uploads\template_3_94a9d7649fb9cdbfc784d3516e61a717_global.php(5420): IPS\Theme\_SandboxedTemplate->__call('sidebar', Array)
#7 C:\inetpub\wwwroot\system\Theme\SandboxedTemplate.php(56): IPS\Theme\Cache\class_core_front_global->globalTemplate('1fa89c086a6a3d0...', '\n<div class='ip...', Array)
#8 C:\inetpub\wwwroot\system\Dispatcher\Dispatcher.php(166): IPS\Theme\_SandboxedTemplate->__call('globalTemplate', Array)
#9 C:\inetpub\wwwroot\system\Dispatcher\Standard.php(103): IPS\_Dispatcher->finish()
#10 C:\inetpub\wwwroot\system\Dispatcher\Front.php(556): IPS\Dispatcher\_Standard->finish()
#11 C:\inetpub\wwwroot\system\Dispatcher\Dispatcher.php(148): IPS\Dispatcher\_Front->finish()
#12 C:\inetpub\wwwroot\index.php(12): IPS\_Dispatcher->run()
#13 {main}
I had a similar issue when rebooting my server and rocket.chat was not yet reachable. I'll have to investigate - currently I don't really know how to reproduce that issue. Probably the error handling does not cover all situations
The widget runs with 4.2.5. Nothing changed there that I'm aware of.
Hang on...