Because its MIME type (”) is not a supported stylesheet MIME type – Report Viewer – SharePoint 2013/2016/2019

setembro 10, 2020

Outro dia instalei dia MS Reporting Services 2016 o módulo de integração com o SharePoint 2016, segui todas as instruções do MSDN.

Provisionei os serviços e Instalei o visualizador (Report Viewer), mas depois dessas configurações realizadas com sucesso, ao renderizar o relatório peguei os erros na imagem abaixo, esse erro impossibilita o carregamento dos relatórios, mas fiquem tranquilos é muito simples de resolver .

Abaixo segue os links, para vocês terem a certeza que passamos pelos mesmo problema.

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.Html5Renderer.js

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.jqueryui.min.js

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.jquery.min.js

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.Html5Renderer.css

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.jqueryui.min.css

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.Html5Toolbar.css

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.Html5Renderer.js

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.Html5Renderer.js

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.jquery.min.js

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.jquery.min.js

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.jqueryui.min.css

http://portal/Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.4411.0&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.Html5Toolbar.css

Causa:

É muito comum quando estamos desenvolvendo/migrando/troubleshooting em SharePoint habilitarmos os erros não amigáveis via web.config, ai esta a causa raiz. Caso uma de suas tags estejam iguais a alguma abaixo, este é o problema!!!

<SafeMode MaxControls="200" CallStack="true" DirectFileDependencies="10" TotalFileDependencies="250" AllowPageLevelTrace="false">

<customErrors mode="Off" />

<compilation batch="false" debug="true">

Solução:

Desabilitar os modos de Debug caso esteja Habilitado, para isso cheque as seguintes tags no web.config da sua aplicação.

<SafeMode MaxControls="200" CallStack="false" DirectFileDependencies="10" TotalFileDependencies="250" AllowPageLevelTrace="false">

<customErrors mode="On" />

<compilation batch="false" debug="false">

A solução é bem simples, mas perdi algumas horas para solucionar esse problema.

Fonte abaixo:

Report Services, Report Viewer, SharePoint 2010, SharePoint 2013, SharePoint 2016, SharePoint 2019, SharePoint | GSD

Uma resposta para “Because its MIME type (”) is not a supported stylesheet MIME type – Report Viewer – SharePoint 2013/2016/2019”.

Alex Talarico

junho 22, 2023 at 1:46 pm

Esta foi a bala de prata. Inacreditável.

English comment to promote search engine visibility below:

SharePoint 2016 Report Viewer Refused to apply style from Reserved.ReportViewerWebPart.axd?OpType=Resource&Version=13.0.6300.2&Name=Microsoft.ReportingServices.Rendering.HtmlRenderer.RendererResources.jqueryui.min.css because its MIME type (”) is not a supported stylesheet MIME type, and strict MIME checking is enabled.

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Written by

Gustavo Delfino

I share my experience in Sitecore and Microsoft technologies such as SharePoint, Dynamics, SQL Server, Power BI, SSIS, and SSRS. I’m a Systems Architect specializing in web applications. I have been working with .NET, Sitecore, SharePoint, and SQL Server since 2008, as well as with Dynamics since version 4.0.

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