Wanting to include an https link in a translation (wish it could be included), I thought that was the one blocking the translation. But in fact it is only the slash character / which blocks the translation. You can test by putting a slash at any place in a sentence.
A workaround is to substitute the slash character by another to allow translation, for example the backslash \ 🙂
This bug doen't exist on the online app https://lingva.ml/