Errors after install

[devchris79]

Hi,

Thanks for the code to try and stop the annoying 404 error on cache corruption. Unfortunately after I installed the module I get errors and can't access the site. Magento gives the following report for the issue:

{"0":"Invalid parameter: parameter must be a non-empty string","1":"<pre>#1 Zend\\Feed\\Writer\\FeedFactory::factory() called at [vendor\/magento\/framework\/App\/Feed.php:36]\n#2 Magento\\Framework\\App\\Feed->getFormattedContent() called at [vendor\/magento\/module-rss\/Model\/Rss.php:110]\n#3 Magento\\Rss\\Model\\Rss->createRssXml() called at [vendor\/magento\/module-rss\/Controller\/Feed\/Index.php:49]\n#4 Magento\\Rss\\Controller\\Feed\\Index->execute() called at [vendor\/magento\/framework\/App\/Action\/Action.php:108]\n#5 Magento\\Framework\\App\\Action\\Action->dispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:58]\n#6 Magento\\Rss\\Controller\\Feed\\Index\\Interceptor->___callParent() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:138]\n#7 Magento\\Rss\\Controller\\Feed\\Index\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:153]\n#8 Magento\\Rss\\Controller\\Feed\\Index\\Interceptor->___callPlugins() called at [generated\/code\/Magento\/Rss\/Controller\/Feed\/Index\/Interceptor.php:26]\n#9 Magento\\Rss\\Controller\\Feed\\Index\\Interceptor->dispatch() called at [vendor\/magento\/framework\/App\/FrontController.php:159]\n#10 Magento\\Framework\\App\\FrontController->processRequest() called at [vendor\/magento\/framework\/App\/FrontController.php:99]\n#11 Magento\\Framework\\App\\FrontController->dispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:58]\n#12 Magento\\Framework\\App\\FrontController\\Interceptor->___callParent() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:138]\n#13 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/module-store\/App\/FrontController\/Plugin\/RequestPreprocessor.php:94]\n#14 Magento\\Store\\App\\FrontController\\Plugin\\RequestPreprocessor->aroundDispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:135]\n#15 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/module-page-cache\/Model\/App\/FrontController\/BuiltinPlugin.php:73]\n#16 Magento\\PageCache\\Model\\App\\FrontController\\BuiltinPlugin->aroundDispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:135]\n#17 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [app\/code\/Infortis\/Cgen\/Plugin\/Magento\/Framework\/App\/FrontController.php:32]\n#18 Infortis\\Cgen\\Plugin\\Magento\\Framework\\App\\FrontController->aroundDispatch() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:135]\n#19 Magento\\Framework\\App\\FrontController\\Interceptor->Magento\\Framework\\Interception\\{closure}() called at [vendor\/magento\/framework\/Interception\/Interceptor.php:153]\n#20 Magento\\Framework\\App\\FrontController\\Interceptor->___callPlugins() called at [generated\/code\/Magento\/Framework\/App\/FrontController\/Interceptor.php:26]\n#21 Magento\\Framework\\App\\FrontController\\Interceptor->dispatch() called at [vendor\/magento\/framework\/App\/Http.php:136]\n#22 Magento\\Framework\\App\\Http->launch() called at [generated\/code\/Magento\/Framework\/App\/Http\/Interceptor.php:24]\n#23 Magento\\Framework\\App\\Http\\Interceptor->launch() called at [vendor\/magento\/framework\/App\/Bootstrap.php:258]\n#24 Magento\\Framework\\App\\Bootstrap->run() called at [index.php:39]\n<\/pre>","url":"\/rss\/feed\/index\/type\/new_products\/","script_name":"\/index.php"}

Any ideas what could be happening here? It seems such a simple module.

[callum-atwal]

Hey @devchris79, are you using a third party module for a blog (such as https://github.com/mageplaza/magento-2-blog/issues/158)?

If not I suspect the cause of this being something internally within the module-rss makes a HEAD request which then by the logic of this plugin, simply returns nothing hence why you're getting an error about an empty string.

Two options from this are

1. You could try disabling Magento RSS if you are not using it
2. I believe 2.3.1 fixes this 404 issue so you could perhaps update Magento.

Hopefully, this helps you

[devchris79]

Hi @callum-atwal and thanks for the reply.

We are running 2.3.1 at the moment, from what I have read the 404 error is due to be fixed in the 2.3.2 release but there isn't a release date yet (although the fix submissions have been closed ready for release).

I think you are quite right that the problem is with the RSS feed that we have switched on, we are using the default Magento functionality for that. Unfortunately I don't really want to turn off my RSS feed as it seems like substituting one problem for another...

The 404 error showed for us on the account login page, once the cache was cleared it works fine, so it seems to suggest its the same issue.

[callum-atwal]

@devchris79 For us, it was a case it was 404'ing on the homepage which was a more urgent issue hence this short term fix.

I haven't actually seen what the official fix was for this; I guess you could cherry pick those commits and create a patch for them until 2.3.2 is released.