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I created a custom block module (nothing fancy, just an A-Z list and a taxonomy list for navigation), this worked fine in D8 & D9, now since upgrading to D10 it only shows when logged out, when logged in, it still writes a debug message to the Apache errorlog from the build() function, so I know the code is being called and I can dump the content to the log, I just get no display of the output. I have a few paths including . Log out and the block is displayed again.

All the answers I can find are for the block not displaying and requiring a login, this works fine until I login.

I'm outputting to the "hero" region and the region is displaying OK, just without my block content.

Any suggestions on what to look for?

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  • Yes, all good, but surely if it was incompatible, it would fail regardless of logon?
    – Alex Monaghan
    Commented Jul 4, 2023 at 12:46
  • Could be caching with your theme. Try with one of the unmodified core themes and see if you can reproduce the issue.
    – Patrick Kenny
    Commented Jul 4, 2023 at 12:58
  • Does the block have caching metadata? It’s not absolutely required: I’m just asking. Perhaps you should show the code.
    – mona lisa
    Commented Jul 4, 2023 at 13:47
  • main element of build is $build = [ '#theme' => 'hopnavigation_block', '#commons' => $commons_menu, '#lords' => $lords_menu, '#az' => $az, '#constituency' => $con_az, ]; return $build; public function getCacheMaxAge(): int { return 0; }
    – Alex Monaghan
    Commented Jul 4, 2023 at 14:06
  • Please put code samples in the Question. It's difficult to format code in comments, and the Question should contain everything necessary for a fact-based answer.
    – mona lisa
    Commented Jul 4, 2023 at 16:32

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Not entirely an answer, but I put the same block into claro theme and all was good, the theme in use was a temporary testing theme so will create new one via starterkit so issue is resolved, even if the actual question was not answered. Testing theme was a clone of Olivero taken from 9.4 using the work at https://github.com/mherchel/olivero-subtheme if that helps others.

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