Sudden unprovoked HTTP500 error, No wp-admin either

Everything was working fine, then this morning my site had a HTTP 500 error? No additional plugins recently. Last post worked fine-two days prior.

Running 2.81

Can’t access wp-admin page either. Thanks for any help you can provide. I search other support strings, but didn’t find the answer. I already tried renaming the “plugin” folder. No success.