not able to upload after select a file in Image Manager

[Zar]

I´m working with the thread here - https://demos.telerik.com/aspnet-ajax/editor/examples/dbfilebrowsercontentprovider/defaultvb.aspx?show-source=true
that the user can create folders, upload, delete files and everything will be stored in a single table in the database. No physical files or folders will be created on the server. Accessing the files from the database is performed with a HTTP handler (Handler.ashx).
It is working fine in development and uat environment. In Production environment, when I select a file to upload it, the upload button gets disabled immediately.
What does it wrong? Please suggest as it is very urgent and Thanks in advance.
?

[Vessy]

Hi Zar,

Even when RadFileExplorer is configured to use custom content provider, the upload files are initially uploaded to a TempFolder inside the application root directory (when they are selected) and after that they are moved to the target storage location. Usually, the described behavior is faced when the application does not have enough permissions to modify the content of this temp folder. The default path to it is as follows:
"~/App_Data/RadUploadTemp"

Please, follow the steps from the following help article in order to make sure that the application is granted with all needed permissions and let me know the results:
https://docs.telerik.com/devtools/aspnet-ajax/controls/fileexplorer/troubleshooting/common-issues#an-error-like--because-the-application-did-not-have-enough-permissions-occurs-only-in-a-production-environment-how-to-debug-the-issue

Regards,
Vessy
Progress Telerik