Problem with showing custom html.twig content im making a custom menu for the homepage. My issue is that whenever I change block--system-menu-block.html.twig to something else that it suggest in the debugging like for example: block--system-menu-block--main.html.twig or block--hoofdnavigatie.html.twig it's not showing up anymore. I've cleared cache, switched themes, but nothing works. It does show up in the dubugging tool that firefox has but theres 0 content in it.. Am I doing something wrong >?
I've tried this on my site and used main navigation and it worked. block--mainnavigation.html.twig

What you can check:


Of course check if you have some typo in file name, or try with
default navigation to see if it works.
https://www.drupal.org/node/2598914 Try to disable Twig cache while you are developing.
Try to use cache rebuild with Drush https://drushcommands.com/drush-8x/cache/cache-rebuild/


I don't think that you are doing something wrong, problem is with caching I believe.