Due to the latest php update to 7.2, most of websites experienced issues with either custom developed code or core code in general. This was the issue with this website The payment plugin was giving an error and thus not allowing users to complete their purchase on the website.
Investigate, update and publish. We spend countless ours investigating the issue and what the main cause could be. Once this stage was completed, we corrected and updated the code as needed and published it. Quick Grow customers can now continue to experience their seamless purchase structured that they are used to.