I think I solved the problem, it worked for my account at least and I can pick up where I left off.
The topic here helped me a lot and I saved my character from the database again.
I did as follows;
First of all, I downloaded the game save files from this link [Sign In] and then
C:\Users.…\AppData\LocalLow\Eleventh Hour Games\Last Epoch\Saves
I made a backup of the Saves folder in the directory and deleted its contents. Then I copied and pasted the backups I downloaded from the link above into this folder and logged into the game via steam. Steam told me that my save files were conflicting and gave me 2 options. Should I send my save files on my computer to Steam Cloud or should I download my files from Steam Cloud to my computer? I chose to download from Steam Cloud again and my problem was solved.
Good games.