Sorry if I misunderstood the question as I'm relying on machine translation, but:
Image limits are based on IP. You may be using a shared IP (possibly a VPN or Proxy), or your ISP issued you an IP which was already used to browse recently.
These do go down again with time so you can wait, or reset it back to 0 using GP, if you do not want to switch to an IP that hasn't been used recently.
Donators with at least 1 star ($20), have the limits tied to their account rather than their IP.
https://ehwiki.org/wiki/Technical_Issues#E-Hentai_Galleries