Jmeter - error when clicking the parameters tab on Samplers

[#1]

I using Jmeter for an excel app that we testing on the browser, so I've recorded steps on Jmeter and samplers were created but I'm having problems when trying to change login details as I want to read them from a CSV file since I'll be signing in with multiple users. I'm getting the error "You cannot switch because data cannot be converted to target Tab data, empty data to switch" when clicking the parameters tab on the user login sampler. Please note that the app is accessed via excel online and I'm not sure if that's the reason for this error, see the below screehshot

Thanks in advance

[#2]

Hi, Actually I have same problem, you could solve this problem?