The GST portal error "Summary for Filing is not Generated" usually occurs due to server load, cache issues, or delayed processing. Common fixes include waiting 20 to 30 minutes, refreshing, logging out and in, clearing cache, using incognito mode, or trying another browser.
NO use trying on different browser, no use clearing cache and cookies. The same error prevails. Extremely hurried and shoddy implementation of GST portal.
I tried everything for this error including clearing cashe, restarting system etc. But finally I was able to solve it by opening the site with a different browser and finally filed my return. So try with a different browser.