Suddenly getting AI text adventure/AI RPG errors when reaching a SUMMARY

When my AI RPG story got long enough to automatically create a “SUMMARY” section it started throwing errors. I reloaded the page, reverted to an older save and tried copy-pasting blocks of text but it errored out again. I don’t want to post the whole story because it’s erotica and I can troubleshoot the lines myself, but can anyone give me some advice or direction as to what might cause this error. Thanks!