I have Blockers — what do I do about them?

Blockers can’t cohabit with Hyvä — they own a flow Hyvä also wants to own (most often the entire checkout). The fix is replacement, not bridging: remove the blocker, install the Hyvä native equivalent, migrate any custom config across. The most common case is a One-Step-Checkout extension — replaced by Hyvä Checkout (free, included in Hyvä 1.3+). For each Blocker the checker shows you what to swap to. Replacement effort is typically 1–3 weeks of dev time depending on how many custom payment/shipping integrations you had hooked into the old flow.