![Validation of viewstate MAC failed error in Asp.Net Web Application | The Microsoft Azure Experience Validation of viewstate MAC failed error in Asp.Net Web Application | The Microsoft Azure Experience](https://themicrosoftazureexperience.files.wordpress.com/2015/02/validation-of-viewstate-mac-failed.jpg?w=640)
Validation of viewstate MAC failed error in Asp.Net Web Application | The Microsoft Azure Experience
![validation of viewstate mac failed when clicking save after updating a node - UI Questions - our.umbraco.com validation of viewstate mac failed when clicking save after updating a node - UI Questions - our.umbraco.com](https://our.umbraco.com/media/upload/7a350f1b-44ce-47b6-b6d8-4b770245f7d7/viewstate-error.png)
validation of viewstate mac failed when clicking save after updating a node - UI Questions - our.umbraco.com
![ASP.NET application is not working properly on a Plesk server: Validation of viewstate MAC failed – Plesk ASP.NET application is not working properly on a Plesk server: Validation of viewstate MAC failed – Plesk](https://support.plesk.com/hc/article_attachments/12377590227479/pool.png)
ASP.NET application is not working properly on a Plesk server: Validation of viewstate MAC failed – Plesk
We are being constantly logged off with 'Validation of viewstate MAC failed' errors. · Issue #709 · SparkDevNetwork/Rock · GitHub
Server Error in '/' Application. Validation of viewstate MAC failed" on clicking to guest folder · Issue #3 · dineshkummarc/JukeBoxAudioPlayer · GitHub
![错误提示:Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster - 知乎 错误提示:Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster - 知乎](https://picx.zhimg.com/v2-2bb3edbdae719dac23c5a702db7466ca_720w.jpg?source=172ae18b)