Hi,

I had a bitcoin wallet with a few coins in it which I installed in my previous Ubuntu 16.04, in 2017.
I didn't use it very much but it was working.
Recently I upgraded (reinstalled) my Ubuntu version to 18.04.02. During the installation a new partition was created, including all my personal files which includes also the bitcoin files. All the bitcoin files are there (the wallet.dat and bitcoin-qt, blocks, etc.) but I can't start the wallet anymore.
Do I need to deinstall the wallet and reinstall it? If so, am I going to lose the coins I had?
And in case I do need to reinstall, how can I do it?

Many thanks in advance...