Siteorigin Editor hangs, so can’t edit text/widget style

Hi!

I used the SiteOrigin Editor for my texts since more than a year ago, and then yesterday I started having problem with the editor. The little waiting circle hangs either on the « text editor » side, and on other blocs will he hang on the « widget style » side. So either my the text side can be edited, or the widget style, but not both! And I must add that this afternoon it’s mostly the « widget style » column that hangs. Something is wrong and can’t work like that.

I tried to delete my browser cache. No result.
I saw with my host. No result. (But they don’t really answered my question about server cache? They connected in my admin to try to find another problem I had at the same time with my server)
I tried to deactivate one plugin at a time. No result. (Was easy to determine, I don’t have a lot of plugin.)

Maybe there’s something I don’t do or don’t know how, or my host forgot to mentioned.

Thank you!