This is just connecting to relays, not trying to post. I.e. just opening a nostr client and looking at other people's notes
Sounds like you have a lot more text etc. than a Kind 1 note can handle (blogpost length?)
Try using https://habla.news/
Discussion
Well, now this is really weird and I don't have an answer on that for you.
Maybe nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6, nostr:npub1jlrs53pkdfjnts29kveljul2sm0actt6n8dxrrzqcersttvcuv3qdjynqn or nostr:npub1xtscya34g58tk0z605fvr788k263gsu6cy9x0mhnm87echrgufzsevkk5s could weigh in here?
Couldn't say, what client is this? Is the error showing up in the console or coming from the relay?