500 error when I try to install a module in the backoffice

[kaynaprod]

I migrated my site from one host to another and since then I have had some problems.

In particular, I have to update my prestashop version in order to be able to use version 7 of php.

I also have the following error when I inspect the request :

Quote

Error: Uncaught Symfony\Component\Debug\Exception\ContextErrorException: Notice: Use of undefined constant PHPEXCEL_ROOT - assumed 'PHPEXCEL_ROOT' in /home/ax477erb/public_html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/ZipArchive.php:31
Stack trace:
#0 /home/ax477erb/public_html/vendor/phpoffice/phpexcel/Classes/PHPExcel/Shared/ZipArchive.php(31): Symfony\Component\Debug\ErrorHandler->handleError(8, 'Use of undefine...', '/home/ax477erb/...', 31, Array)
#1 /home/ax477erb/public_html/vendor/symfony/symfony/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php(194): require_once('/home/ax477erb/...')
#2 /home/ax477erb/public_html/vendor/symfony/symfony/src/Symfony/Component/Debug/FatalErrorHandler/ClassNotFoundFatalErrorHandler.php(149): Symfony\Component\Debug\FatalErrorHandler\ClassNotFoundFatalErrorHandler->convertFileToClass('/home/ax477erb/...', '/home/ax477erb/...', 'PHPExcel')
#3 /home/ax477erb/public_html/vendor/symfony/symfony/src/Symfony/Component/Debug/FatalErrorHandler/Cl (500 Internal Server Error)

When I try to install the Prestashop 1.Click Upgrade module I have the following error:

Quote

MethodNotAllowedHttpException in classes.php line 2118:No route found for "GET /module/manage/action/install/autoupgrade": Method Not Allowed (Allow: POST)

 

in classes.php line 2118

at RouterListener->onKernelRequest(object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher))

at call_user_func(array(object(RouterListener), 'onKernelRequest'), object(GetResponseEvent), 'kernel.request', object(TraceableEventDispatcher)) in WrappedListener.php line 61

at WrappedListener->__invoke(object(GetResponseEvent), 'kernel.request', object(ContainerAwareEventDispatcher))

at call_user_func(object(WrappedListener), object(GetResponseEvent), 'kernel.request', object(ContainerAwareEventDispatcher)) in classes.php line 1871

at EventDispatcher->doDispatch(array(object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener), object(WrappedListener)), 'kernel.request', object(GetResponseEvent)) in classes.php line 1786

at EventDispatcher->dispatch('kernel.request', object(GetResponseEvent)) in TraceableEventDispatcher.php line 140

at TraceableEventDispatcher->dispatch('kernel.request', object(GetResponseEvent)) in bootstrap.php.cache line 3236

at HttpKernel->handleRaw(object(Request), '1') in bootstrap.php.cache line 3206

at HttpKernel->handle(object(Request), '1', false) in bootstrap.php.cache line 3360

at ContainerAwareHttpKernel->handle(object(Request), '1', false) in bootstrap.php.cache line 2562

at Kernel->handle(object(Request), '1', false) in index.php line 86

 

Thank you in advance for your help.