Thanks for getting back on this.
Ok, this indeed seems to be a low memory issue as I see oput of the 512 Mb, I have only 7 Mb free.
However, I have many other webstes running on simliar config websites for months & years now. Those sites havce way more traffic as well (the website in question here is a staging server for now), and I have had never had such issues. So, I am trying to guess why is this happening in this case.
Any pointers here please?
Also, if I have to, how do I upgrade my plan?