Issues while installation Flarum 0.1.0 beta 9 on a server!

[2019-07-05 18:28:21] Flarum Installer.ERROR: Flarum\Http\Exception\MethodNotAllowedException: OPTIONS in ******/forum.***.org/public_html/vendor/flarum/core/src/Http/Middleware/DispatchRoute.php:62
Stack trace:
#0 ******/forum.***.org/public_html/vendor/zendframework/zend-stratigility/src/Next.php(60): Flarum\Http\Middleware\DispatchRoute->process(Object(Zend\Diactoros\ServerRequest), Object(Zend\Stratigility\Next))
#1 ******/forum.***.org/public_html/vendor/flarum/core/src/Http/Middleware/StartSession.php(62): Zend\Stratigility\Next->handle(Object(Zend\Diactoros\ServerRequest))
#2 ******/forum.***.org/public_html/vendor/zendframework/zend-stratigility/src/Next.php(60): Flarum\Http\Middleware\StartSession->process(Object(Zend\Diactoros\ServerRequest), Object(Zend\Stratigility\Next))
#3 ******/forum.***.org/public_html/vendor/flarum/core/src/Http/Middleware/HandleErrorsWithWhoops.php(43): Zend\Stratigility\Next->handle(Object(Zend\Diactoros\ServerRequest))
#4 ******/forum.***.org/public_html/vendor/zendframework/zend-stratigility/src/Next.php(60): Flarum\Http\Middleware\HandleErrorsWithWhoops->process(Object(Zend\Diactoros\ServerRequest), Object(Zend\Stratigility\Next))
#5 ******/forum.***.org/public_html/vendor/zendframework/zend-stratigility/src/MiddlewarePipe.php(83): Zend\Stratigility\Next->handle(Object(Zend\Diactoros\ServerRequest))
#6 ******/forum.***.org/public_html/vendor/zendframework/zend-stratigility/src/MiddlewarePipe.php(72): Zend\Stratigility\MiddlewarePipe->process(Object(Zend\Diactoros\ServerRequest), Object(Zend\Stratigility\EmptyPipelineHandler))
#7 ******/forum.***.org/public_html/vendor/zendframework/zend-httphandlerrunner/src/RequestHandlerRunner.php(95): Zend\Stratigility\MiddlewarePipe->handle(Object(Zend\Diactoros\ServerRequest))
#8 ******/forum.***.org/public_html/vendor/flarum/core/src/Http/Server.php(46): Zend\HttpHandlerRunner\RequestHandlerRunner->run()
#9 ******/forum.***.org/public_html/index.php(22): Flarum\Http\Server->listen()
#10 {main}