On page Page edit problem

Try increasing the memory available to PHP.

Thanks @esmi

Plz check this i have also this error
Allowed memory size of 33554432 bytes exhausted (tried to allocate 396789 bytes) in /public_html/wp-includes/class-feed.php on line 4

What plugins are you running?

That’s the same issue.

i have added memory allocation code but last error showed again

Have you spoken to your hosts?