Re: Allowed memory size of 134217728 bytes exhausted
the file mentioned in the error message (lib\init\tra.php) is a file taking care of loading translations
have you changed the site language? Maybe try to set it back to english. You can also check the \lang folder, find your language.php and see if it is still valid or maybe it got too big. You can also try to disable the preference to collect untranslated strings (https://doc.tiki.org/i18n+Admin)
not sure if this is the cause, but maybe worth a try
hope it helps,
cheers,
gezza