fastest cache not working. I am unable to publish

Can you give some more details please?

I trashed a paged and rewrote it with the same page name and tried to publish it it would not publish or save as a draft. I tried removing the cache using my plugin fastest cache. I am still unable to publish or save and preview is not working either. The SEO is unable to read my content. I am just stuck. I know it means the old cache is still there. what do I do

are you using a server-side cache system?

I do not know how fastest cache plugin operates. I downloaded it through my WordPress website

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