Disabling the extension fixed the bugs.
Next Illuminate\Database\QueryException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'is_sticky' in 'order clause' (SQL: select * from `users` where `id` in (select `id` from `users` where `username` like recapt%) order by `is_sticky` desc, `frontpage` desc, `frontdate` desc, `last_posted_at` desc limit 6) in /var/www/html/flarum/vendor/illuminate/database/Connection.php:669
Stack trace:
#0 /var/www/html/flarum/vendor/illuminate/database/Connection.php(629): Illuminate\Database\Connection->runQueryCallback()
#1 /var/www/html/flarum/vendor/illuminate/database/Connection.php(338): Illuminate\Database\Connection->run()
#2 /var/www/html/flarum/vendor/illuminate/database/Query/Builder.php(2149): Illuminate\Database\Connection->select()
#3 /var/www/html/flarum/vendor/illuminate/database/Query/Builder.php(2137): Illuminate\Database\Query\Builder->runSelect()
#4 /var/www/html/flarum/vendor/illuminate/database/Query/Builder.php(2609): Illuminate\Database\Query\Builder->Illuminate\Database\Query\{closure}()
#5 /var/www/html/flarum/vendor/illuminate/database/Query/Builder.php(2138): Illuminate\Database\Query\Builder->onceWithColumns()
#6 /var/www/html/flarum/vendor/illuminate/database/Eloquent/Builder.php(546): Illuminate\Database\Query\Builder->get()
#7 /var/www/html/flarum/vendor/illuminate/database/Eloquent/Builder.php(530): Illuminate\Database\Eloquent\Builder->getModels()
#8 /var/www/html/flarum/vendor/flarum/core/src/User/Search/UserSearcher.php(75): Illuminate\Database\Eloquent\Builder->get()
#9 /var/www/html/flarum/vendor/flarum/core/src/Api/Controller/ListUsersController.php(81): Flarum\User\Search\UserSearcher->search()
#10 /var/www/html/flarum/vendor/flarum/core/src/Api/Controller/AbstractSerializeController.php(96): Flarum\Api\Controller\ListUsersController->data()
#11 /var/www/html/flarum/vendor/flarum/core/src/Http/RouteHandlerFactory.php(38): Flarum\Api\Controller\AbstractSerializeController->handle()
#12 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/DispatchRoute.php(65): Flarum\Http\RouteHandlerFactory->Flarum\Http\{closure}()
#13 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\DispatchRoute->process()
#14 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/SetLocale.php(50): Laminas\Stratigility\Next->handle()
#15 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\SetLocale->process()
#16 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/CheckCsrfToken.php(37): Laminas\Stratigility\Next->handle()
#17 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\CheckCsrfToken->process()
#18 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/AuthenticateWithHeader.php(55): Laminas\Stratigility\Next->handle()
#19 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\AuthenticateWithHeader->process()
#20 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/AuthenticateWithSession.php(32): Laminas\Stratigility\Next->handle()
#21 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\AuthenticateWithSession->process()
#22 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/RememberFromCookie.php(51): Laminas\Stratigility\Next->handle()
#23 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\RememberFromCookie->process()
#24 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/StartSession.php(61): Laminas\Stratigility\Next->handle()
#25 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\StartSession->process()
#26 /var/www/html/flarum/vendor/flarum/core/src/Api/Middleware/FakeHttpMethods.php(29): Laminas\Stratigility\Next->handle()
#27 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Api\Middleware\FakeHttpMethods->process()
#28 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/ParseJsonBody.php(28): Laminas\Stratigility\Next->handle()
#29 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\ParseJsonBody->process()
#30 /var/www/html/flarum/vendor/flarum/core/src/Http/Middleware/HandleErrors.php(57): Laminas\Stratigility\Next->handle()
#31 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Flarum\Http\Middleware\HandleErrors->process()
#32 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(84): Laminas\Stratigility\Next->handle()
#33 /var/www/html/flarum/vendor/middlewares/request-handler/src/RequestHandler.php(84): Laminas\Stratigility\MiddlewarePipe->process()
#34 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Middlewares\RequestHandler->process()
#35 /var/www/html/flarum/vendor/middlewares/base-path-router/src/BasePathRouter.php(97): Laminas\Stratigility\Next->handle()
#36 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Middlewares\BasePathRouter->process()
#37 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Middleware/OriginalMessages.php(42): Laminas\Stratigility\Next->handle()
#38 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Laminas\Stratigility\Middleware\OriginalMessages->process()
#39 /var/www/html/flarum/vendor/middlewares/base-path/src/BasePath.php(53): Laminas\Stratigility\Next->handle()
#40 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/Next.php(61): Middlewares\BasePath->process()
#41 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(84): Laminas\Stratigility\Next->handle()
#42 /var/www/html/flarum/vendor/laminas/laminas-stratigility/src/MiddlewarePipe.php(73): Laminas\Stratigility\MiddlewarePipe->process()
#43 /var/www/html/flarum/vendor/laminas/laminas-httphandlerrunner/src/RequestHandlerRunner.php(96): Laminas\Stratigility\MiddlewarePipe->handle()
#44 /var/www/html/flarum/vendor/flarum/core/src/Http/Server.php(42): Laminas\HttpHandlerRunner\RequestHandlerRunner->run()
#45 /var/www/html/flarum/index.php(26): Flarum\Http\Server->listen()
#46 {main}