White page of death when updating to 1.2.6

[Bgagger]

after uploading the 1.2.6 rooms files to replace 1.2.5 I get the White page of death.
With the following PHP errors:

[09-Feb-2019 14:46:24 UTC] PHP Fatal error: Uncaught TypeError: Argument 2 passed to kasimi\mchatrooms\event\main_listener::__construct() must implement interface phpbb\template\template, instance of dmzx\mchat\core\settings given, called in /home/***********/public_html/devforum/cache/production/container_4335734bbdd20f586549a504dff5f80c.php on line 2192 and defined in /home/***********/public_html/devforum/ext/kasimi/mchatrooms/event/main_listener.php:57
Stack trace:
#0 /home/***********/public_html/devforum/cache/production/container_4335734bbdd20f586549a504dff5f80c.php(2192): kasimi\mchatrooms\event\main_listener->__construct(Object(phpbb\language\language), Object(dmzx\mchat\core\settings))
#1 /home/***********/public_html/devforum/vendor/symfony/dependency-injection/Container.php(295): phpbb_cache_container->getKasimi_Mchatrooms_Listener_MainService()
#2 /home/***********/public_html/devforum/vendor/symfony/dependency-injection/ContainerBuilder.php(446): Symfony\Component\DependencyInjection\Container->get('kasimi.mchatroo...', 2)
#3 /home/***********/public_html/ in /home/***********/public_html/devforum/ext/kasimi/mchatrooms/event/main_listener.php on line 57


I have regular prosilver set as theme.
I also made an upgrade recently of mchat from 2.1.1 to 2.1.2 which seems to have gone without a hitch.

I hope you can make heads or tails of what might be wrong, let me know if there is anything else you need to know about our phpBB setup.

[kasimi]

Never replace/overwrite files when updating an extension. Always completely remove the old version's files before uploading the new version:

• Disable the extension
• Delete the extension files
• Upload the new extension files
• Enable the extension

Did you try deleting your [root]/cache/production folder?

[Bgagger]

That was sloppy of me, my bad... Do over, do it right...

Everything is fine now. the new updates looks to be working fine.

[kasimi]

I'm glad it was that easy to fix.