Noticed in Fatal-Monitor after deploying 1.33.0-wmf.8 to group1
Url: /w/api.php?format=json&formatversion=2&action=jsondata&title=Plas+Gogerddan.map on wikidatawiki
[{exception_id}] {exception_url} InvalidArgumentException from line 420 of /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php: Passing in the "body" request option as an array to send a POST request has been deprecated. Please use the "form_params" request option to send a application/x-www-form-urlencoded request, or the "multipart" request option to send a multipart/form-data request.
#0 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(340): GuzzleHttp\Client->invalidBody()
#1 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(273): GuzzleHttp\Client->applyOptions(GuzzleHttp\Psr7\Request, array)
#2 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(100): GuzzleHttp\Client->transfer(GuzzleHttp\Psr7\Request, array)
#3 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(106): GuzzleHttp\Client->sendAsync(GuzzleHttp\Psr7\Request, array)
#4 /srv/mediawiki/php-1.33.0-wmf.8/includes/http/GuzzleHttpRequest.php(121): GuzzleHttp\Client->send(GuzzleHttp\Psr7\Request)
#5 /srv/mediawiki/php-1.33.0-wmf.8/extensions/JsonConfig/includes/JCUtils.php(116): GuzzleHttpRequest->execute()
#6 /srv/mediawiki/php-1.33.0-wmf.8/extensions/JsonConfig/includes/JCCache.php(221): JsonConfig\JCUtils::callApi(GuzzleHttpRequest, array, string)
#7 /srv/mediawiki/php-1.33.0-wmf.8/extensions/JsonConfig/includes/JCCache.php(183): JsonConfig\JCCache->getPageFromApi(string, GuzzleHttpRequest, array)
#8 /srv/mediawiki/php-1.33.0-wmf.8/extensions/JsonConfig/includes/JCCache.php(60): JsonConfig\JCCache->loadRemote()
#9 /srv/mediawiki/php-1.33.0-wmf.8/extensions/JsonConfig/includes/JCSingleton.php(373): JsonConfig\JCCache->get()
#10 /srv/mediawiki/php-1.33.0-wmf.8/extensions/JsonConfig/includes/JCDataApi.php(20): JsonConfig\JCSingleton::getContent(JsonConfig\JCTitle)
#11 /srv/mediawiki/php-1.33.0-wmf.8/includes/api/ApiMain.php(1595): JsonConfig\JCDataApi->execute()
#12 /srv/mediawiki/php-1.33.0-wmf.8/includes/api/ApiMain.php(531): ApiMain->executeAction()
#13 /srv/mediawiki/php-1.33.0-wmf.8/includes/api/ApiMain.php(502): ApiMain->executeActionWithErrorHandling()
#14 /srv/mediawiki/php-1.33.0-wmf.8/api.php(87): ApiMain->execute()
#15 /srv/mediawiki/w/api.php(3): include(string)
#16 {main}Url: /w/index.php?title=Especial:Livro&bookcmd=render_collection&colltitle=Wikilivros%3ALivros%2FIntrodu%C3%A7%C3%A3o+%C3%A0+l%C3%ADngua+portuguesa&writer=rl on ptwikibooks
#0 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(340): GuzzleHttp\Client->invalidBody()
#1 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(273): GuzzleHttp\Client->applyOptions(GuzzleHttp\Psr7\Request, array)
#2 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(100): GuzzleHttp\Client->transfer(GuzzleHttp\Psr7\Request, array)
#3 /srv/mediawiki/php-1.33.0-wmf.8/vendor/guzzlehttp/guzzle/src/Client.php(106): GuzzleHttp\Client->sendAsync(GuzzleHttp\Psr7\Request, array)
#4 /srv/mediawiki/php-1.33.0-wmf.8/includes/http/GuzzleHttpRequest.php(121): GuzzleHttp\Client->send(GuzzleHttp\Psr7\Request)
#5 /srv/mediawiki/php-1.33.0-wmf.8/includes/http/Http.php(75): GuzzleHttpRequest->execute()
#6 /srv/mediawiki/php-1.33.0-wmf.8/includes/http/Http.php(122): Http::request(string, string, array, string)
#7 /srv/mediawiki/php-1.33.0-wmf.8/extensions/Collection/rendering/MWServeRenderingAPI.php(39): Http::post(string, array, string)
#8 /srv/mediawiki/php-1.33.0-wmf.8/extensions/Collection/rendering/CollectionRenderingAPI.php(78): MWServeRenderingAPI->makeRequest(string, array)
#9 /srv/mediawiki/php-1.33.0-wmf.8/extensions/Collection/rendering/CollectionRenderingAPI.php(55): CollectionRenderingAPI->doRender(array)
#10 /srv/mediawiki/php-1.33.0-wmf.8/extensions/Collection/Collection.body.php(1055): CollectionRenderingAPI->render(array)
#11 /srv/mediawiki/php-1.33.0-wmf.8/extensions/Collection/Collection.body.php(261): SpecialCollection->renderCollection(array, Title, string)
#12 /srv/mediawiki/php-1.33.0-wmf.8/includes/specialpage/SpecialPage.php(569): SpecialCollection->execute(NULL)
#13 /srv/mediawiki/php-1.33.0-wmf.8/includes/specialpage/SpecialPageFactory.php(558): SpecialPage->run(NULL)
#14 /srv/mediawiki/php-1.33.0-wmf.8/includes/MediaWiki.php(288): MediaWiki\Special\SpecialPageFactory->executePath(Title, RequestContext)
#15 /srv/mediawiki/php-1.33.0-wmf.8/includes/MediaWiki.php(862): MediaWiki->performRequest()
#16 /srv/mediawiki/php-1.33.0-wmf.8/includes/MediaWiki.php(517): MediaWiki->main()
#17 /srv/mediawiki/php-1.33.0-wmf.8/index.php(42): MediaWiki->run()
#18 /srv/mediawiki/w/index.php(3): include(string)
#19 {main}