error indexing dns look up failed

[RCTSH]

I have almost the whole domain without indexing in google
because it gives error

I have analysed the domain with several utilities and it gives the same a lot of addresses like the ones in the picture server response 0 dns look up failed

https://recitoners.net/18997-large_default/ordenador-portatil-20vd00ulsp-lenovo-thinkbook-14-gen-2-intel-core-i3-356-cm-14-1920-x-1080-pixeles-8-gb-256-gb-win.jpg

https://recitoners.net/intel-xeon-gold-6226r-29-ghz-16-nucleos-32-hilos-22-mb-cache-lga3647-socket-para-prolia

https://recitoners.net/brother-mfc-l9630cdn-impresora-multifuncion-color-laser-a4-legal-material-hasta-40-ppm-

If you put them in the search engine they exist but they give an error and cause me a big mess by not indexing the pages or products.

Can you tell me why I get this error and how to solve it?

PROBLEM 2

I also have many addresses that no longer exist that do not disappear from the index as these

https://recitoners.net/727-fuente-alimentacion-powebank

https://recitoners.net/compatibles-xerox

https://recitoners.net/compatibles-konica

https://recitoners.net/compatibles-sharp

https://recitoners.net/compatibles-oce

https://recitoners.net/compatibles-epson