UiPath.Web.Activities library problem

Hello everyone. I try to du an sentiment analysis. I attached the related video and website which I try to do.

Sentiment Analysis — text-processing.com API 1.0 documentation

I have below problem. Who may help me, please?

Unexpected error has occurred during the library compilation process:
Unable to create activity builder for Main.xaml. Reason was ‘Cannot create unknown type ‘{http://schemas.uipath.com/workflow/activities}HttpClient’.’.

Thanks in advance.

Hi @Abdullah_Davut_Demirbilek
did u tried to update the activities ?

Yes. I installed UiPath.Web.Activities.

Like did the version is new one for the activities?


Upgrade the package version in Manage Packages and try again validating the project

If it is upgraded and failing though, then downgrade it and try


Hello everyone. I have installed UiPath.Web.Activities before. I used .Net Framework 461 as target. I installed Connector.Twitter.Activities. I deleted all steps in the main workflow and applied them again. Now it is ok.

Thanks to everyone.

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