The image you attached is to small to read and the text becomes blurry when zoomed.What should I do with this error?
If I'm guessing correctly that error message indicates that you have exceeded the maximum Local Storage quota your web-browser allows for locally opened HTML files (1).
If I am correct then you need to delete entries from that cache associated with that 'domain', and the simplest way to do that is to delete the contents of less important Save Slots either in this game or any of the other Twine / HTML based games you play.
It is also possible to use your web-browser's Web Developer tools to manual delete entries from the Local Storage section associated with the `file://` protocol, or to clear your web-browser's (cookie) cache. However both of these options can result in you losing other data.
(1) Modern Web-browsers restrict the maximum amount of Local Storage available on a per 'domain' basis, and all locally opened HTML files share the same single 'domain'. The maximum size for each 'domain' is generally between 5-10 MB depending on the Web-browser / OS / Device being used, although it can be less in some cases.