Thanks for writing in!
You are running X 2.6.0 and X shortcodes 2.5.0 which is way older version. You will need to update it to the latest version. Please be aware that X shortcodes plugin and its functionality has been consolidated into Cornerstone which will be installed automatically by going to X > Validations if you are using the latest version of the X theme. To know more about Cornerstone, please check this out: https://theme.co/apex/forum/t/cornerstone-content-builder-introduction/118/1
Before doing any updates, I would recommend that you create a staging site. This is very useful because you can test drive any X 6.46 updates in the staging area, do the customizations and troubleshooting without disrupting your live site. Once everything is perfect, you can easily and flawlessly proceed the update in the live site. To know how to create a staging area, please check out these articles:
Please let us know how it goes.