Problem uploading sketch - genuino uno

Hi,

I got a big problem and need some quick help, as the project has to be handed in tomorrow.

I was writing a sketch for my GENUINO UNO yesterday and all went well. Today I adjusted a few points and cant upload it to my board anymore?? Using the same settings... I checked the Port and even tried every one out, but it wouldnt work.

Im sorry if theres already a topic with my exact problem, but I´m new on here and it´s quite urgent...

I will attach a screenshot so maybe somebody has an advice for me.

Greetings,
Marie

(deleted)

Apparently your board is no longer on COM6.