Older versions of iPhone OS aren't new enough to have modern certificate authorities trusted, meaning only sites using older certificate authorities are able to have a secure connection.

Here are links to modern Certificate Authorities that may not be trusted on older devices (some other complications may prevent sites using these certificates from working, those can not be fixed by these.)

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If the server refuses your URL link, the file size is too large. Re-optimize the GIF by reducing the number of frames or limiting the color palette further until the file size drops below 10 KB.

Don't use MS Paint; it doesn't support transparency or GIF animation properly. Don't use Photoshop unless you know the "Save for Web (Legacy)" settings—modern Photoshop often exports GIFs that are too large for RO. ragnarok guild emblem gif better link