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I'm using PhpMyAdmin for a while on my Debian VPS but recently it started to make Error 500 when accessing the "Structure" tab for the tables (tbl_structure.php page)... and only this !

Error in processing request
Error code: 500
Error text: Internal Server Error (rejected)
It seems that the connection to server has been lost. Please check your network connectivity and server status.

Debian 10 / Apache 2.4.38 / PHP 8.0.1 / mysqlnd 8.0.1 / PhpMyAdmin 5.0.4deb1~bpo10+1

I gave all permissions to the user on the databse, it not solved the problem. Looking in firebug, the header for phpmyadmin/tbl_structure.php is "500 Internal Server Error" BUT the response is a complete JSON, so it seems data are well sended by the server, but the client probably see the 500 error and not process it.

Has anybody can help with that ? Thank you

E_D
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2 Answers2

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Solution found! As I mentionned on https://github.com/phpmyadmin/phpmyadmin/issues/16620

I followed this Symfony bug solution https://github.com/symfony/symfony/commit/8e34978e4e2c4bf7dac97e44e904368c4cfb54f8

I added array_value on line 1177 of usr/share/php/Symfony/Component/DependencyInjection/ContainerBuilder.php and everything work now!

E_D
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From what I see on the version this is the Debian bug (980375) and you will need to remove and re-install the phpMyAdmin package.

(it could be another error but I think it is most likely to be the Debian bug)

As I said on the issue tracker, here

William Desportes
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    I'm not sure if its just me or everyone using Mac but I face the issue right on the home page after login. PHP 8.0.12; PHPMyAdmin 5.1.3; Firefox 99.0.1; Apache 2.4.51. PHPMyAdmin Installed using composer. The `phpmyadmin/vendor/symfony/dependency-injection/ContainerBuilder.php` within the phpmyadmin directory already has the patch discussed (`array_values`). It's just the annoying popup everytime though. All functionality seems to work fine. – Fr0zenFyr May 11 '22 at 09:08