topic Re: Qlik Data Gateway - Connection Internal error Value cannot be null. (Parameter 'value') in Move to Qlik Cloud Analytics

Qlik Data Gateway - Connection Internal error Value cannot be null. (Parameter 'value')

yocrozet — Tue, 27 Jan 2026 10:45:26 GMT

Hello,

I'm trying to connect my MySQL database to our cloud tenant, but I'm getting the following error: "Value cannot be null. (Parameter 'value')".

I've searched for an explanation, but haven't found anything. I'm not sure if I need to configure something in the gateway settings (C:\ProgramData\Qlik\Gateway) or elsewhere.

The connection works fine between the on-premises version of Qlik and the MySQL database. So the problem seems to be related to the connection via the gateway.

Thank you in advance for your help.

Re: Qlik Data Gateway - Connection Internal error Value cannot be null. (Parameter 'value')

QFabian — Wed, 01 Oct 2025 13:02:06 GMT

Hi @yocrozet , in my case, that same error happened because there was an antivirus blocking the .exe in server folder where Direct Access Gateway was installed.

Re: Qlik Data Gateway - Connection Internal error Value cannot be null. (Parameter 'value')

yocrozet — Wed, 01 Oct 2025 14:35:37 GMT

Qlik server folders are excluded from antivirus

Re: Qlik Data Gateway - Connection Internal error Value cannot be null. (Parameter 'value')

yocrozet — Wed, 08 Oct 2025 12:42:14 GMT

The problem was resolved by changing the port used by the gateway. The default port was already in use by another software.