Hello there Radoslav,
the error message you provide is not very useful for the general public, perhaps it can trigger something for the actual developers, but it gives me no clue :)
I would suggest you to look for a log file that ThinkingRock usually leaves behind (I have never instructed TR to do so but it is generated by default). On Unix systems, including Linux and probably OS/X you can find the log file on your home directory, e.g.:
/home/user/.thinkingrock/tr-3.0.3/var/log/messages.log
Obviously you should replace the username ('user' in this example) and the actual version of TR you are using :)
If you were unable to locate the log file, and assuming you are on a Unix machine, try
ls ~/.thinkingrock
or open a file explorer and browse
~/.thinkingrock
Cheers!