2023.2 Help Publishing

I am attempting to publish my mod on the mcreator site. I know how to get to the publishing page, I know how to get the .jar file.

However, when it asks me to choose a file and I choose my correct .jar file, finish the page information and click the "post modification to the community" button, it then removes the file I chose and say I didn't choose a file. The choose file area is highlighted red with the message "This Value Should Not Be Null." I have retried various times being sure to select the proper file and it continues to do the same thing over and over. I do not know how to fix this. Please help.