Data separate and melting

Hi everyone,

I have data frame with column like this:

And I want to separate data from this column into many sub-column (value is separated by ‘;’). After that, I melt table. I am already done with R code.

However, when I run on Knime with conda environment, the problem is:

Therefore, how can I fix this issue. I also install package in my code as well as conda environment.

Thank you in advance.