Plugin not working everytime

Hello,
I found an issue in the plugin that may be related for the untested version of WP. So, I’ve added the plugin in my WP, I followed through the video tutorial and manage to get the result I wanted during my first test. I have 2 folder in my Google drive(1 for the origin and the other one is for the destination). During my first test, I put in 2 documents in the origin folder and after a few minutes the docs was feed into WP and then the documents where moved to the destination folder[which is great].

However, when I added a new document in the origin folder; the documents did not go to WP and was not move to the destination folder. Been waiting for the transfer to work for almost an hour now and the documents are still not being transferred to WP and destination folder.

Is this issue due to the newest version WP I’m using. Cause I’m using the latest version of WP and I noticed in the note in the plugin that the plugin is not yet tested to the latest version of WP.

Any help would be greatly appreciated.