Error message and non-generation of excel file through the execution of plugin

Hello everyone, I am a new user of ImageJ, I have been using a bespoke plugin to extract certain parameters through image analysis. The plugin is supposed to execute with the creation of an excel file that would contain all the numerical values of the parameters. Unfortunately, after a recent update of the software, the plugin no longer creates the desired excel file as a result of which I am unable to extract relevant data for my image analysis. I am attaching the error message for your reference. I am not an expert at ImageJ but rather an intermediate/beginner user.

Your valuable suggestions are most welcomed.

thank you in advance