my imported video files and videoclips on the timeline are suddenly in slow motion without sound

Hi! I have been using Premiere Elements for a long time now, and I have succesfully edited videoclips with the program. Now I have a problem. I wanted to make a new video clip, so I imported some videofiles and a music file into premiere elements. When I put the files in the timeline, I noticed there was no sound and the clip was in slowmotion. When I clicked on the clip in the import section, it is the same thing. I opened an old premiere elements file with a complete filmclip that I made, and also that file suddenly only had slowmotion movie without any sound.

this cannot be because of the type of files I am using, because it also doesn't work anymore with videos that I previously made. also I checked for updates, and the program was completely up to date. does someone have any idea how this is possible en how to fix this problem? thank you so much!