The problem Lbertay is, among others, the ‘payment service providers Stripe and PayPal’.
Links
Liberapay: https://www.kuketz-blog.de/liberapay-aktuell-keine-spende-moeglich/
German spoken: https://www.kuketz-blog.de/liberapay-aktuell-keine-spende-moeglich/
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Privacy friendly translator: DeepL Translate: The world's most accurate translator
Also take a look at the ‘donation barometer’.