Yes there is a Premiere Elements forum... into which I have moved this message
If you will start at the Forums Index https://forums.adobe.com/welcome
You will be able to select a forum for the specific Adobe product(s) you use
Click the "down arrow" symbol on the right (where it says All communities) to open the drop down list and scroll
What version of Premiere Elements are you using and on what computer operating system is it running?
When you import source media into a Premiere Elements project, all you get in the project are copies of the originals. But those copies in the project need to trace back to the originals at the hard drive save location where they were when they were first imported into the project.
If you have trying to open an existing project and are getting "Where is the file.....?" messages, the the possibilities include:
a. you have moved, deleted, or renamed files/folders that went into the project after you saved closed the project.
b. you have your source media on an external hard drive and that external hard drive has malfunctioned, perhaps changing drive letter.
Each of those "Where is the file....?" messages shows the specific name of the file that the program needs. You need to connect
the message with the exact file name that is cited in the "Where is the file....?" message, exact not similar.
Please consider all of the above and also read the Adobe document on troubleshooting damaged projects.
You can also use the Replace Footage feature of the program to reconnect missing media. But start first trying to work
out the problem with the "Where is the file.....?" message.
Looking forward to your follow up.