This activity is either missing or could not be loaded properly!

[sunnywsl (WS Lau)]

Hello ALL,

I need to modify an old developed UIPath application, but there are some activities that prompted “Missing or invalid activity”.

If I update the project dependencies using “Manage packages”, then the activities “InvokeWorkFlowFile” will lose the input arguments and introduced new errors

Anyone can suggest the best approach to fix it?

[sb001]

Try it by downgrading Activities package version.

[sunnywsl (WS Lau)]

Do you mean to try downgrade the version 1 by 1 until the issue is fixed?

[muhammedyuzuak]

Hi @sunnywsl,

My recommendation is as follows.

Validation Error problem!1

Hi @kjaiswal, My advice is to downgrade your package versions first and understand what’s going on in these areas. Then create these fields again by upgrading the package version. Considering that you got the work from somewhere else, you may have problems when you remove it directly. Before you remove it, be sure of what activities and content you will replace. Regards, MY

Regards,
MY

[muhammedyuzuak]

First downgrade and understand what’s going on, then upgrade packages and rebuild them.

[sb001]

Not sure whether it will fixed your issue or not.
But you can try it by downgrading packages those activities are missing or Invalid.

[Vaibhav_Rajpoot_17 (Vaibhav Rajpoot)]

@sunnywsl

Have a look on this->

Managing Packages

[sunnywsl (WS Lau)]

Thanks Everyone and your valuable comment.
The project is now alright without error by selecting the suitable package version.