Issue with SIMPLEOS: can't stake my EOS

[Lawgame]

If I try to stake my eos on simpleos I have this message "operation timeout, please try again or select another endpoint". I tried again and again but it doesn't work. I tried to change endpoints (https://api.eossweden.org - https://eos.greymass.com - https://nodes.get-scatter.com - https://eu.eosdac.io) but they don't work. How can I fix this problem? Thanks