How are you doing the backup/restore? did you backup your database and re-download mediawiki? are the versions of PHP the same on both servers?

On Mon, Oct 25, 2021 at 4:28 PM Jingyi C. Shi <jshizhang@gmail.com> wrote:
Thank you, Andre!
Below is the stack trace I got.


[d7e9d262] /xxx/index.php/Welcome MWException from line 1287 of /var/www/xxx/includes/parser/Preprocessor_DOM.php: PPFrame_DOM::expand: Invalid parameter type

Backtrace:

#0 /var/www/xxx/includes/parser/Parser.php(3342): PPFrame_DOM->expand(NULL, integer)
#1 /var/www/xxx/includes/parser/Parser.php(645): Parser->replaceVariables(string, PPFrame_DOM)
#2 /var/www/xxx/includes/parser/Parser.php(5081): Parser->preprocess(string, Title, ParserOptions)
#3 /var/www/xxx/includes/cache/MessageCache.php(1020): Parser->transformMsg(string, ParserOptions, Title)
#4 /var/www/xxx/includes/Message.php(1129): MessageCache->transform(string, boolean, Language, Title)
#5 /var/www/xxx/includes/Message.php(797): Message->transformText(string)
#6 /var/www/xxx/includes/Message.php(860): Message->toString()
#7 /var/www/xxx/includes/OutputPage.php(958): Message->text()
#8 /var/www/xxx/includes/OutputPage.php(1005): OutputPage->setHTMLTitle(Message)
#9 /var/www/xxx/includes/page/Article.php(514): OutputPage->setPageTitle(string)
#10 /var/www/xxx/includes/actions/ViewAction.php(44): Article->view()
#11 /var/www/xxx/includes/MediaWiki.php(490): ViewAction->show()
#12 /var/www/xxx/includes/MediaWiki.php(287): MediaWiki->performAction(Article, Title)
#13 /var/www/xxx/includes/MediaWiki.php(714): MediaWiki->performRequest()
#14 /var/www/xxx/includes/MediaWiki.php(508): MediaWiki->main()
#15 /var/www/xxx/index.php(41): MediaWiki->run()
#16 {main}


The versions of the new server are:
CentOS 7
Apache/2.4.51
PHP 7.4.25
mysql  Ver 8.0.23
MediaWiki version 1.26.2


As I am restoring from my backup files and the old server was down, I don't have the information about the old server.


Please let me know if more information is needed! Thank you and look forward to any further help!

Best,
Catherine


On Mon, Oct 25, 2021 at 7:02 AM <mediawiki-l-request@lists.wikimedia.org> wrote:

Message: 2
Date: Mon, 25 Oct 2021 09:35:25 +0200
From: Andre Klapper <aklapper@wikimedia.org>
Subject: [MediaWiki-l] Re: Pages not showing with error messages
To: MediaWiki announcements and site admin list
        <mediawiki-l@lists.wikimedia.org>
Message-ID:
        <98b3b562efecc4af73a67f7582f69c2834b62b2d.camel@wikimedia.org>
Content-Type: text/plain; charset="UTF-8"

Hi,

On Sun, 2021-10-24 at 23:55 -0500, Jingyi C. Shi wrote:
> I am restoring my mediawiki website on a new server. It happened this
> error:
> [4027854c] /dir/index.php/Welcome_to_MyWebsite MWException from line
> 1287 of /var/www/xxx/dir/includes/parser/Preprocessor_DOM.php:
> PPFrame_DOM::expand: Invalid parameter type

Please see https://www.mediawiki.org/wiki/Manual:How_to_debug to get a
stacktrace and provide MediaWiki and PHP version information for both
servers.

Thanks,
andre
--
Andre Klapper (he/him) | Bugwrangler / Developer Advocate
https://blogs.gnome.org/aklapper/



On Sun, Oct 24, 2021 at 11:55 PM Jingyi C. Shi <jshizhang@gmail.com> wrote:
Dear all,

I am restoring my mediawiki website on a new server. It happened this error:
[4027854c] /dir/index.php/Welcome_to_MyWebsite MWException from line 1287 of /var/www/xxx/dir/includes/parser/Preprocessor_DOM.php: PPFrame_DOM::expand: Invalid parameter type

Do you have any ideas? What does it indicate?
I look forward to any help. Thank you all!

Best,
Catherine
_______________________________________________
MediaWiki-l mailing list -- mediawiki-l@lists.wikimedia.org
To unsubscribe send an email to mediawiki-l-leave@lists.wikimedia.org
https://lists.wikimedia.org/postorius/lists/mediawiki-l.lists.wikimedia.org/