Cant connect to MYSQL after update to 4.2

It means that your config file is invalid.

I can't figure out what is not valid
the only change in the file is this :

<entry key='database.driver'>org.h2.Driver</entry>
<entry key='database.url'>jdbc:h2:/home/user/Documents/traccar/target/database</entry>
<entry key='database.user'>sa</entry>
<entry key='database.password'></entry>

to this

<entry key='database.driver'>com.mysql.jdbc.Driver</entry> 
<entry key='database.url'>jdbc:mysql://localhost:3306/mytraccardb?useSSL=false&amp;allowMultiQueries=true&amp;autoReconnect=true&amp;useUnicode=yes&amp;characterEncoding=UTF-8&amp;sessionVariables=sql_mode=''</entry>
<entry key='database.user'>root</entry> 
<entry key='database.password'>******************</entry>

How is possible to not working??

It's easily possible if you have some typo or your text editor messes up with content.

Can you suggest compatible editor ?

Any text editor that doesn't modify your content for you would do.

@Panagiotis

Change localhost for 127.0.0.1

<entry key='database.url'>jdbc:mysql://localhost:3306/

<entry key='database.url'>jdbc:mysql://127.0.0.1:3306/

I fix it changing it

@Castillo Thanks for the advice but I already solved it.
Anton was right. The problem was the password. The copy-paste from the text editor was creating this issue. When I wrote manually a more simple password without many special characters the problem solved.

@Castillo Thanks so much!... that did the trick!... after an SO update, the app stop working, after a while, I found the solution on your post!

@Omar Riffo @Dr Panos

I am very glad it worked for you