No one else has reported this error, and I have not seen it during any of my testing.
Can you please PM me your error log so I can see what file is causing this error, I can then look into this further.
Also, out of curiosity what is your site running on? Is it shared hosting, VPN, dedicated server etc?
If you are on a basic web package it may be worth upgrading to a VPN.
I thought this may be the case. I am afraid this is not an error with my plugin, but more to do with the resources available to you on your shared plan.
As you add plugins to your Oxwall package it will require more and more resources to run and on a shared package the limit can be reached quickly.
I am afraid you are going to have to upgrade your shared hosting package with your provider or move to something like a VPS to avoid these resource restrictions.
This kind of thing comes up all the time in the Oxwall forum, please see this thread as an example: https://developers.oxwall.com/forum/topic/43141
Many thanks,