Premium theme failed to install plugins and import demo data.

A friend of mine purchased a premium wordpress theme from themeforest. Installed but when he installed and activated the plugins he got this error.

Fatal error: Allowed memory size of 67108864 bytes exhausted (tried to allocate 49152 bytes) in /home/…/public_html/***.com/wp-content/plugins/types/library/toolset/types/embedded/frontend.php on line 951.

He contacted the Author of the theme and he didnt replied for 3 days(and still waiting for a reply). Then he contacted me to resolve this issue. I think this is disgusting that one purchased a theme and later on he has to get help from a professional to resolve an error. This theme requires extra memory_limit, some hosts requires customer to contact them in order to make these changes.

This is definitely NOT a theme problem, but low tier hosting issue.