replay from host customer service

Mustafa, I could see that the actual error which was causing the issue was:
[Sun Sep 27 19:35:19 2020] [error] [client 156.204.228.32] PHP Fatal error:  Allowed memory size of 268435456 bytes exhausted (tried to allocate 320026598 bytes) in /home/mcubepla/public_html/wp-content/plugins/updraftplus/includes/class-filesystem-functions.php on line 736, referer: http://www.mcubestudios.com/wp-admin/options-general.https://pastebin.com/php?page=updraftplus