cannot install some add-ons

The rest of the other add-ons I can install, but I cannot install these following add-ons :

adsotrans
Chinese-Straits
LDC English-chinese wordlist
MoEdict

What should I do? Glad if anyone can help and thank you in advance.

Can you try a different internet connection or VPN? It may be an issue with the server you’re downloading from.

i will try, and let you know later. thanks.