An alternate is you can "inspect" the link (by right clicking) and then extract the wallet address out of there, then manually send the 49,000 bytes payment to that address.
This is (was) a known iphone issue with the steemit attestation bot. I had that for ages and it eventually fixed itself. You could try removing the bot and re-adding it.
You could try to re-download the wallet.
An alternate is you can "inspect" the link (by right clicking) and then extract the wallet address out of there, then manually send the 49,000 bytes payment to that address.
This is (was) a known iphone issue with the steemit attestation bot. I had that for ages and it eventually fixed itself. You could try removing the bot and re-adding it.