cant download updates anymore

Hi. On my site it was never possible (unfortunately!) to have the plugins updates via Wordpress. So I always had to download them manually from https://wplms.io/verify-purchase/?purchase_code=XXX&plugin=wplms.io/vibebp.zip or https://wplms.io/verify-purchase/?purchase_code=XXX&plugin=wplms.io/wplms_plugin.zip That does not work anymore, either. No download starts. I get a message, that the page is insecure. I am pretty sure my purchase code stayed the same from the beginning (at least I couldn't find any new) - so WHAT SHALL I DO? A lot of stuff is not working anymore, I really need to update, most of the translations are gone, some of the custom CSS is gone (will open a lot of new tickets in the coming days) but first of all I need desperately to update - and the old way does not work anymore. Pleas help soon. Daniela