Hi all!
My workflow is working on my local.
But when I upload my workflow on the server and test run.

I'm getting this error message.
I don't know why, because this workflow is working on my local.
This is my workflow,

I have 4 source files and I used the formula tool to output each available user group data to the template.
For example. If I have an HKBU user group data it will save to the HKBU template and so on.

And this is my formula tool.
I've already used Block Until Done tool but I don't know where to put the BUD tool in my workflow.
Thank you!